80-9y=-7y

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Solution for 80-9y=-7y equation: 



80-9y=-7y

We move all terms to the left:

80-9y-(-7y)=0

We get rid of parentheses

-9y+7y+80=0

We add all the numbers together, and all the variables

-2y+80=0

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

-2y=-80

y=-80/-2

y=+40

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