63=-9a+3(a+3)

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Solution for 63=-9a+3(a+3) equation: 



63=-9a+3(a+3)

We move all terms to the left:

63-(-9a+3(a+3))=0



We calculate terms in parentheses: -(-9a+3(a+3)), so:

-9a+3(a+3)

We multiply parentheses

-9a+3a+9

We add all the numbers together, and all the variables

-6a+9

Back to the equation:

-(-6a+9)



We get rid of parentheses

6a-9+63=0

We add all the numbers together, and all the variables

6a+54=0

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

6a=-54

a=-54/6

a=-9

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