-12-a=72

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Solution for -12-a=72 equation: 



-12-a=72

We move all terms to the left:

-12-a-(72)=0

We add all the numbers together, and all the variables

-1a-84=0

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

-a=84

a=84/-1

a=-84

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