-2(a+6)-(-7a-7)=2a-1+a-8

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Solution for -2(a+6)-(-7a-7)=2a-1+a-8 equation: 



-2(a+6)-(-7a-7)=2a-1+a-8

We move all terms to the left:

-2(a+6)-(-7a-7)-(2a-1+a-8)=0

We add all the numbers together, and all the variables

-2(a+6)-(-7a-7)-(3a-9)=0

We multiply parentheses

-2a-(-7a-7)-(3a-9)-12=0

We get rid of parentheses

-2a+7a-3a+7+9-12=0

We add all the numbers together, and all the variables

2a+4=0

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

2a=-4

a=-4/2

a=-2

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