A17.8 Solving Systems of Equations by Elimination

From http://www.squidoo.com/systemsofequations this is an example of a system of equations being solved by the elimination method. For more example check out http://teachingandlearningmath.blogspot.com/

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[machoskiller]

Mr. Trent Tormoehlen...i think thts how its spelled...

sick...400k total views is pretty good for a nerd

hahah

[ttor68]

@machoskiller who are you?

[ibme4life]

the tutors on the internet are way better then my crappy teachers...

[narutooftheblade]

o_o wa..??

[TheyCallMejmar]

im pretty sure im ready for this test thanks!

[123456bibikun]

iloveyou!

[KansasCityKing1962]

NICE!!!!!

I finally found out this nonense.

[JetsToReason]

yeah. my teachers always fail.

[AfgForLyfe01]

yea i know lol

[TheAnimeLoverForever]

agree.

[blingazzizi]

you would want to combine the equations together to eliminate one of the variables: (1)=> 5x-2y=-15 (2)=>2x-2y=-15

first multiply eq (1) by -1=> -5x+2y=15 then add that to eq (2) you would end up with (-5x+2x)+(2y-2y)=0; or -3x=0, therefore x=0. you then substitute 0 in for x in eq (1)=> 5(0)-2y=-15; or y=-15/-2, therefore y=7.5

[shadeexx]

what if you have an equation that STILL has both x and a y

for example 5x-2y=-15 and 2x-2y=-15