3(3a-6)-(-7a-1)=63

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Solution for 3(3a-6)-(-7a-1)=63 equation: 



3(3a-6)-(-7a-1)=63

We move all terms to the left:

3(3a-6)-(-7a-1)-(63)=0

We multiply parentheses

9a-(-7a-1)-18-63=0

We get rid of parentheses

9a+7a+1-18-63=0

We add all the numbers together, and all the variables

16a-80=0

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

16a=80

a=80/16

a=5

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