-12a+4a+7=-9

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Solution for -12a+4a+7=-9 equation: 



-12a+4a+7=-9

We move all terms to the left:

-12a+4a+7-(-9)=0

We add all the numbers together, and all the variables

-8a+16=0

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

-8a=-16

a=-16/-8

a=+2

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