SOLUTION: 30/10+y = 20/10-y

Question 40339: 30/10+y = 20/10-y
Answer by smik(40) (Show Source): You can put this solution on YOUR website!
Good Question. I'm guessing you meant 30/(10+y) = 20/(10-y).
Anyway, our first aim is to get rid of the denominators because those don't help a lot when solving equations. So we can first multiply both sides by (10+y) and then multiply both sides by (10-y).

(we multiply both sides by 10+y)

(we multiply both sides by 10-y)

We can factor this out:

(subtract 200 from both sides, and add 30y to both sides)

(the final answer)
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