-2(a+3)-a=6

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Solution for -2(a+3)-a=6 equation: 



-2(a+3)-a=6

We move all terms to the left:

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

We add all the numbers together, and all the variables

-1a-2(a+3)-6=0

We multiply parentheses

-1a-2a-6-6=0

We add all the numbers together, and all the variables

-3a-12=0

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

-3a=12

a=12/-3

a=-4

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