-7y+9=-8y

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



-7y+9=-8y

We move all terms to the left:

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

We get rid of parentheses

-7y+8y+9=0

We add all the numbers together, and all the variables

y+9=0

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

y=-9

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