-9(8+7a)=-639

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Solution for -9(8+7a)=-639 equation: 



-9(8+7a)=-639

We move all terms to the left:

-9(8+7a)-(-639)=0

We add all the numbers together, and all the variables

-9(7a+8)-(-639)=0

We add all the numbers together, and all the variables

-9(7a+8)+639=0

We multiply parentheses

-63a-72+639=0

We add all the numbers together, and all the variables

-63a+567=0

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

-63a=-567

a=-567/-63

a=+9

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