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-9(y+9)=-40

We move all terms to the left:

-9(y+9)-(-40)=0

We add all the numbers together, and all the variables

-9(y+9)+40=0

We multiply parentheses

-9y-81+40=0

We add all the numbers together, and all the variables

-9y-41=0

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

-9y=41

y=41/-9

y=-4+5/9

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