-12y=-(9y-63)

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Solution for -12y=-(9y-63) equation: 



-12y=-(9y-63)

We move all terms to the left:

-12y-(-(9y-63))=0



We calculate terms in parentheses: -(-(9y-63)), so:

-(9y-63)

We get rid of parentheses

-9y+63

Back to the equation:

-(-9y+63)



We get rid of parentheses

-12y+9y-63=0

We add all the numbers together, and all the variables

-3y-63=0

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

-3y=63

y=63/-3

y=-21

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