9-(2a+6)=(-9)

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Solution for 9-(2a+6)=(-9) equation: 



9-(2a+6)=(-9)

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(2a+6)+18=0

We get rid of parentheses

-2a-6+18=0

We add all the numbers together, and all the variables

-2a+12=0

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

-2a=-12

a=-12/-2

a=+6

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