Systems of Equations-Elimination-Part1

[DonaldCanard1]

much better then my Mexican math teacher

[katie83rox]

@LuisThe4125 HOLY SHIT my reacher is the EXACT SAME WAYY!!!

[LuisThe4125]

everyone has a teacher is annoying and cant teach, i have on her name is ms.wilson she thinks she can teach but the reason why her other classes pass is becouse they copy each other without the teacher seing

[tinkerliker]

Thank you!!! Now I get it!

[LacrosseBoy20]

my math teacher sucks...she called my mom like 20 times...for signing my name on a piece of paper

[Neotraight]

Thumbs up if u hate ur math teacher

[123poet123]

Do you have a video of solving system of equations with 3 and 4 variables? Id rather use the substitution and elimination method

[CaliforniaBarbie21]

This is my school.

[carnellrw2010]

like this if you are on here during your week of finals at school

[nightfallenstar]

Hi, amazing video just one thing on question two why on earth do we have to minus 6x? i really dont understand this. Other than that everything else is brilliant :) x

[brenduhhize]

when you have two opposite signs dont you have to subtract??

[tiffytutu1]

so would y for the 2nd part of the first equation be 1 or -1????

[SieraJean]

i forgot how to do this but within the first 20 seconds of your video i was quickly reminded and was able to finish my homework :) thanks mr.hansen!

[Hansen48066]

You need to watch my part 2 video!

my channel is Hansen48066

[Alexys1017]

I have the lines 2x+y=2 and 3x-2y+10

what do i do?! Adding/subtracting won't cancel out any of the variables :( :(

[TitWarlord]

every vid has them doing easy problems

[carmelarouk]

i thought the guy said "welcome back to HANDSOme...blah..blah..blah" yeah, sorry about that hansen

[3n0p1a]

how did u get the x variable = 3 ??

[MirarulezTV]

Thank you for the help :)

[DEARADRIXX]

ahh tnkss so much!!!!

[617jorge]

Hey why do my teacher shows longer operation your like short-cutting damn you teachers i now not hate math instead i'm hating my teacher

[bryanlcrockett]

Why aren't you my math teacher!?

[heyshopgirl]

My teacher sucks but you rock.

[thetopmeowzer]

thanks this helped me study for my exams

[iGotUrLimeSoda]

@thetopmeowzer Same.

[TheWizomaniac]

Thanks so much! This really helped me study for my final!

[wendy5640]

omg thank you so much! My teacher don't know what he's doing... wait but what if you don't have any similar coefficients?

[papashankz]

@wendy5640 If 1 of your variables doesnt have any similar coefficients, you must multiply the whole equation out by whatever the coefficient of the other equation is. EX 3x+4y=-5 and x-5y=-8. You distribute -3 to x-5y==8 ( -3[ x-5y=-8] and u get -3x+15y=24. you then add the 2 equations, which equals 19y=19. 19y/19=19/19. y=1.

[beaverfeaver12]

what if none of the equations have coefficients that are the same

[bb123ism]

You explained this better than my science, math, and English teachers. Not even some of my smart friends could. Thank you sooo much!

[MrFiercelyFuzzy]

Thanks for this video, it helped a lot. My only question(rather silly one at that) are you using a Red G2 by Pilot?

[BlueMoon8899]

This helped sooo much!!!! You saved my life!!! (well maybe not that dramatic but I still love you!)

[RoyaLDubstepx]

thanks better than my teacher

[bullseyestudio2small]

there is just on problem with this video wen u get into the ninth grade sometime both the coefficients dont match up so perhaps u would like to show us all how to make them match up by multiplying i do like this video it joged my memory again and got me back on assignment so i do have to thankyou

[bullseyestudio2small]

there is just on problem with this video wen u get into the ninth grade sometime both the coefficients dont match up so perhaps u would like to show us all how to make them match up by multiplying i do like this video it joged my memory again and got me back on assignment so i do have to thankyou

[freshness2ify]

this guy just made my life sooo much easier! thank you!

[scarrwarce]

I am in 8th grade and you explain alot better and thank you you are better than my teacher

[sweaznizz]

YOU SERIOUSLY ROCK DUDE

i have not been able to get this since my teacher taught this and my grades dropped to an F coz i didnt pass my test but just this one time i watch this i know EVERYTHANG i just wish i could go back in time and watch this sooner

[23chanb]

comment # 42420

[thecommentnetwork]

what about fractions

[bunniboo1414]

thank you, are you canadian?? sorry

[MissRockStarr11]

THANKS SOOO MUCH!! :) BETTER THAN MY TEACHER AND THEY TALK ABOUT IT FOR HOURS AND IT ONLY TOOK YOU 3 mins! AND I GOT A BETTER UNDERSTANDING!

[xRABEE123x]

OMG THANK YOU SO MUCH!

I didn't know that you could subtract it tought addition was the only method

thank than you so much my exam is tommorow i would have been screwed withought you!

[originalgangsterloc]

@xRABEE123x

did u do good on ur exam lol

[McWonderAzn]

im asian so i can do this

[MsTbreezy24]

thank you but when you get the x on the first equation you should show how to get afterwards! :)

[MsTbreezy24]

@MsTbreezy24 show how to get the y

[cod4vshalo]

thanks

[livindatlife]

thanks soooo much i've been lost in my algebra 2 class since i first got there. The way you explain it is much easier

[kayring13]

this is the way my teacher explains it :0

but this video still helped me

[singhinderjit95]

thank u

[akwardwithemphasis]

haha jeff said that. JDtheAmazzing is a silly boy a part of our group. dont worry were not mocking him

[Willdabest15]

So what do you do if you have an equation that doesn't have a number in the top or bottom equation that match? Is there a way to do the elimination method without matching numbers? I ask because my workbook is telling me that I need to solve by elimination and there are no matching numbers. Here's the problem that I have been given:

3x+y=17

4x+2y=20

Help would be much appreciated! I'm totally stumped!

[JDtheAmazzzing]

What do you do if neither have co-efficients with like numbers...I think I phrased that right. Like this equation:

6X-2Y=11

-9X+3Y=16

Niether have the same co-efficient

[akwardwithemphasis]

@JDtheAmazzzing Step one: shut up.

[kzalldaz]

@akwardwithemphasis Step 2: Realize that he asks questions to pass and not shutting up to fail.

[garysheer]

awesome help thanks so much

[nata184]

very good explanation! helped me do all my hw! :D

[supersaiyangotenks]

how to do if its like this -14=-20y-7x and 10y+4=2x and another one 3+2x-y=0 and -3-7y=10x

[GermanChihuahua]

Thanks! Helped me alot. :D

[gotgold11316]

ur awesome, ur voice is slower than my teacher which helps me out alot, thanks. Ur great

[HaZaRdxSKiiLz1]

my teacher is dumbass i like your explanation alot better!!!

[bubblerei]

thank you so much!

you teach way better than my teacher hahaha!

[someoneskater678]

I wish my math teacher could explain as simple as this.

[1truebleu1]

thanks so much u really helped :)

[wannago94]

I agree alot better then my math teacher and she spent the whole period teaching us and I still did not get and but after watching your 3 and a half minute video I understand it completely

Thanks man!!!

[alexismaetaylor]

ah thank you so much !!

[Eldelgadin96]

man your awsome thanks the explenation was waayyy clearer then my teachers thank you

[DjCroatia1993]

I get a question like this, 3x+Y=7 and 5x-Y=9, if I add it all up I remove Y and get 2x=16 because I am suppose to "subtract", but its making no sense at all. But if I added, It too would not make any sense because I would get 7x=16, divide that and you get 2.3(rounded from 2.2857)

[DjCroatia1993]

never mind, made I mistake

[weissgyz]

lol well if you got 2x=16, x would equal 8 wouldn't it? Then sub x=8 into one of the equations and solve for Y.

[DjCroatia1993]

@weissgyz yes... been behind the book too long lol

[weissgyz]

@DjCroatia1993 lol :P

[someoneskater678]

then 2.3 is your answer

[evanmcorleytv]

HOLY CRAP, you rock!!!, 50 times better than my teacher, I love how you keep the steps short and simple, but my teacher lectures it, and it gets old, and I don't learn... but anyway THANKS!!!

[bunbunx1]

to help kids out , or whatever.

when you get to 5x = 15 . you should show the division part .like put /5 under 5x and /5 under 15 .THEN ya get 3 , which is x (:

thats my opinion most people are visual .

[Hansen48066]

I agree with you. I had to cut corners to try and get the video to a minimum file size. Also, I *assume* most students at this level can solve a one-step equation implicitly. Thanks for the feedback :)

[NaviVids]

you are awesome, you teach about 10x better then my teacher

[Boba2388]

its funny cause i had no idea how to solve elimination problems before this and in the first 28 seconds (no joke literally 28 seconds) of the video i understood perfectly now i can blow threw my homework like nothing thanks!

[devildawg321]

I must be learning impaired because i got my teacher to explain itto me 100 times and still didnt get it.. Then I looked up your video and i started to understand it a bit better but still not quite, tyvm for this video : )

[Tichondruis]

Im in 9th, and my teacher doesnt explain things. He just says the basics, doesnt go over the problem, and just sends us off. He says just read our book. Thanks a ton, Hanson. You made that so much easier to grasp.

[soljiagurl09]

me too..well i used a calculator so i got 3.6

[brickmaster24]

freshman evrywhere thank you

[wisluthkid]

Thanks for doing this it just helped me.

[TENspeaks]

+2y-4y= -2y (not 6y). Otherwise, good explanation Hansen48066.

[Hansen48066]

It was actually 2y - (-4y) which indeed

equals 6y.

[ktlovestorok]

dude ur my hero. my math teacher has the worst axcent and i cant understand shit

[cardcutter]

what if you sitll have a y left

[3moory95]

nice man

thx

i really know how to study math :D lol

[DyingWithASmile]

you're seriously better than my teacher ! HAHA, yey! thank you! :D

[MrStinky123321]

CORRECT :D

pencils suck, pens = ownage :D

[MrStinky123321]

Ty so much man, I have been trying to figure out how to solve this problem for maybe 3-5 days. Should of looked at youtube first XD

Thanks again 5 stars :]

[fenderxstrat]

have a quiz tommorow and I can do this all in my head but my teacher is all about work so thanks for explaining it to me because I always get all the answers right but never show my work so I get a bad grade. :(

[MrStinky123321]

My teachers were like that too =/

[Jessica3vamp3slayer]

Thank u so much! I'm doing Summer homework so thanks.

[ExoKon551]

yeah me too, i should have done this stuff in june when i remembered it.

[xmodboi246]

THANK YOU!

your better than my teacher!...lol

[linkfanatic13579]

lol I'm in eighth but our school district treats all our main classes as a high school course so we need to take the finals and if we fail it's summer school XD

[linkfanatic13579]

lol you need to take the regents in pen...

[lovolu]

gee thanks man u totally saved my life!

[cubanboy740]

thanks alot xD my teacher knows the material but dosent know how to teach students.. (to much screaming) thanks again =)

[XxDonRYxX]

my physics teacher is like that she is so... uh.... she screams at us like shes gonna turn into da HULK!!!

[Brack13Attack]

You shouldn't do math in pen.

Thank you.

[treemonisha2006]

says who? what rule book says MATH SHOULD ONLY BE DONE IN PENCIL??? Get a life!!!!!

[bulgaria5]

thank u =]

[Misslilpunk]

Yes, You can...

Well I'm not sure neither

But when I get the answer

and is a fraction my teacher doesnt say anything

Well he just want us to change it to a mix number :)

[aznkevinnumber7]

Misslilpunk (1 month ago)

Yes,

You can...

Well I'm not sure neither

But when I get the answer

and is a fraction my teacher doesnt say anything

Well he just want us to change it to a mix number :)

wrong person..

[Misslilpunk]

The equation is:

6x+2y=-8

6x-4y=-10

Is the answer is:

x=1/3 and y=3?

[bulgaria5]

grr im not 100% sure but someone told me u cant have fractions in the answer...

[juniorchickn]

hey, i need help with solving linear system by elimination.

8x-5y=15

4x-2y=-9

I already found y. but i cant find the x value.

please help me

[Hansen48066]

y = -33. Sub into either equation. example:

4x - 2(-33) = -9 which leads to 4x + 66 = -9

Subtract 66 from both sides to get 4x  = -75. Thus x = -75/4

[juniorchickn]

oohh i get it now

thanks alot Hansen!

can u show me how u got y = -33 because i got a different answer than -33.

thanks again.

[Hansen48066]

I multiplied the bottom equation by -2.

So, you have -8x + 4y = 18. Now you add the two equations and get -1y = 33. Thus y = -33. Try it paper and pencil!

[juniorchickn]

alright i just did it on paper, and i fully understand it now, thanks alot , u really helped me.

now i know what im doing

thanks again.

[Hansen48066]

Actually, it should be written out as 8 - (-10). Subtraction is the same as "adding the opposite." Therefore, we have 8 + (+10). That is why the result is +18. Hope this helps.

[funybuny1]

far out dude, u talk exactly like my maths teacher, thnx u helped mate.

becuase i knew how to do it but i needed to refresh, u know how it is :). thank you

[Hansen48066]

Multiply the second equation by 3. So you'll have 15x - 3y = 39. Add both equations and the y-variable will drop out. 17x = 51.

[arminom]

Damn fine job.

[Ncaa09Fan]

Thank you so much Mr.Hanson this helped me so much!

[Magilla500]

ty helped me alot

[ayahitopoooh]

hi hanSen,

[Hansen48066]

I have also e-mailed a more detailed reply. Best of Luck!

[upload]

Thank you Mr.Hansen, this tutorial rules!

[XxBlackMulanxX]

thank u again!

[tbighic]

mr hansen..dude this helped gaaatcho style!!!

[haiooona]

I'm studying for my finals and you really helped me alot in reviewing previous chapters that i forgot how to solve.

[Hansen48066]

Find the least common multiple to eliminate either X or Y. Focusing on Y, multiply the top row by 2, and the bottom row by 3.

4x - 6y = 16

9x +6y = -3

Now, if you add like terms, the Y-variable will be eliminated.

13x = 13

Solving for x, you get x = 1

I think this answers your question.

Have a superb end of the school year. Best of luck as a Freshmen next year!

[SalemFU]

Thank you SO much for this. I am studying to take the ACT after going to a, shall I say, less than educational school? I'm teaching myself some new things and reviewing a lot of others. I tend to overwork or over-look things,- sometimes the obvious, haha. This video really helped me and I very much appreciate it! You taught me more in about 30 seconds than my entire 6th-12th grade years. Sad, huh?

[SylyxStealth]

Thank you, Mr.Hansen. This helped me a lot. I subbed u.

[KurtdScared]

damn mallgrave shouldve just showed us thus vid

[afarinmirzadeh]

Thanks so much for making these videos! I was really struggling in math but you've helped me a lot. :)

[colistro]

man thanks a lot ur awesome :D my teacher doesnt know how to teach thanks :D

[MorganaCoke]

ok i love u now! i was so confuzzled b4 now. my math class thanks you because no one understood it til i called everyone and told them about your video.

[Hansen48066]

Wow - thanks a lot. What a nice compliment :)

[zxxmarioparodyxx]

bow down to the masta

*bowing bowing*

[fudgenism]

wow u have helped me a ton,but how on earth would you do one that has fractions for x and y? tia

[Hansen48066]

Off the top of my head, I would generally multiply the equation (all the terms) through by a multiple that would eliminate the fraction if possible. Here's a simple example.

1/2x + 3/4y = 5

if you multiply through by 4, you'll rid yourself of the fractions.

4[1/2x + 3/4y = 5]

thus...

2x + 3y = 5

then proceed as usual. Best of luck!

[1ato]

thank you dude you rock!!!!!

[Ujandiya10]

what if u have 3x+y=20  x+y=12

[1ato]

try plugging in a one if there is just an x or y. (1x) or (1y). hope this helps.

[teaforlife1234]

omg i finally understand this , i been going through night how to understand this Thank you!

[Austwill0]

Thanks SOOOOOOO much. I missed my class notes today explaining it and i thought i was in trouble for homework. THANK YOU SOOOOOOOOOOOOOOOOOO much!!!

[Morgisakim]

I'm lost when you find the X or Y part after you found the first x or y part.

[rafael2323]

this helps for my midterms thanks alot

[SailorxVenus]

thank you!!!!!!!!

[demonkibawolf]

thank you u really help me understand how the to the systems of equations *elimination*! man i wish the text book can explain better

[slimshady1111]

thanx man helped me out

[crishuamani]

thanks so much