-2a+12+5a=6a-9a

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Solution for -2a+12+5a=6a-9a equation: 



-2a+12+5a=6a-9a

We move all terms to the left:

-2a+12+5a-(6a-9a)=0

We add all the numbers together, and all the variables

-2a+5a-(-3a)+12=0

We add all the numbers together, and all the variables

3a-(-3a)+12=0

We get rid of parentheses

3a+3a+12=0

We add all the numbers together, and all the variables

6a+12=0

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

6a=-12

a=-12/6

a=-2

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