12a-7=-31

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Solution for 12a-7=-31 equation: 



12a-7=-31

We move all terms to the left:

12a-7-(-31)=0

We add all the numbers together, and all the variables

12a+24=0

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

12a=-24

a=-24/12

a=-2

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