7y+8=9y-7

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



7y+8=9y-7

We move all terms to the left:

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

We get rid of parentheses

7y-9y+7+8=0

We add all the numbers together, and all the variables

-2y+15=0

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

-2y=-15

y=-15/-2

y=7+1/2

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