8y-20=9y-7

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Solution for 8y-20=9y-7 equation: 



8y-20=9y-7

We move all terms to the left:

8y-20-(9y-7)=0

We get rid of parentheses

8y-9y+7-20=0

We add all the numbers together, and all the variables

-1y-13=0

We move all terms containing y to the left, all other terms to the right

-y=13

y=13/-1

y=-13

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