-63=7(a-7)

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Solution for -63=7(a-7) equation: 



-63=7(a-7)

We move all terms to the left:

-63-(7(a-7))=0



We calculate terms in parentheses: -(7(a-7)), so:

7(a-7)

We multiply parentheses

7a-49

Back to the equation:

-(7a-49)



We get rid of parentheses

-7a+49-63=0

We add all the numbers together, and all the variables

-7a-14=0

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

-7a=14

a=14/-7

a=-2

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