More advanced ratio problem--with Algebra (HD version)
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oh hahahah my teacher showed me this one
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@thebillybobhobillybo thanks lol
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@topmodel5k in case this answer isn't too late, he was saying that 5 and taking away 15 apples which is 5-15 over 8 oranges will equal the ratio of 1/4 like he said in the beginning of the problem.
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good here is another way to solve it. Here is another way to solve this. Let x = the number of we multiply apples and oranges by to get that ratio. then we know 5x/8x = 5/8; So 5x-15/8x = 1/4; 5x - 15 = 2x; 3x = 15; x = 5; So now we now how many groups are there we just multiply 5(5) - 15 + 8(5) = 10 + 40 = 50; I hope that makes sense.
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but we know that the ratio, but we know that the ratio, but we know that the ratio of ...so when I take away 15, when I take away 15, when I take away 15 apples...
You're teaching is useful, but you repeat statements an irritating number of times. You should listen to yourself. I'm not sure whether this a redundant teaching technique or what, but every video has this.
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you don't even need algebra to solve this question, i calculated this in my head, i multiplied 5 apples by 5 and also 8 oranges by 5 and i got 25 over 40, then i subtracted 15 apples from 25 and got 10 apples over 40 oranges then i divided both by 10 and it was 1 over 4. then 25+40=65-15 apples =50 pieces of fruits
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???I AM COMPLETELY LOST
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@spykiss72 please show how you got 1/4
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I agree i got lost in the middle of it XD
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HD looks good.
I appreciate you sharing your time and talent.
haroldchode 2 years ago 16
Your discussion on apples and oranges is too complicated. Almost all ratio problems can be more simply solved by scaling. For example, the ratio 5/8 (apples to oranges) = 5x/8x for every positive x. Remove 15 apples and the ratio becomes (5x-15)/8x = 1/4. Solve for x (x=5) to determine there were 5x=25 apples and 8x=40 oranges. Simple.
spykiss72 2 years ago 9