9-(2a+12)=0

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Solution for 9-(2a+12)=0 equation: 



9-(2a+12)=0

We get rid of parentheses

-2a-12+9=0

We add all the numbers together, and all the variables

-2a-3=0

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

-2a=3

a=3/-2

a=-1+1/2

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