81=9y+9

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Solution for 81=9y+9 equation: 



81=9y+9

We move all terms to the left:

81-(9y+9)=0

We get rid of parentheses

-9y-9+81=0

We add all the numbers together, and all the variables

-9y+72=0

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

-9y=-72

y=-72/-9

y=+8

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