8a+4a=-12

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Solution for 8a+4a=-12 equation: 



8a+4a=-12

We move all terms to the left:

8a+4a-(-12)=0

We add all the numbers together, and all the variables

12a+12=0

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

12a=-12

a=-12/12

a=-1

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