-a-12=-8

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Solution for -a-12=-8 equation: 



-a-12=-8

We move all terms to the left:

-a-12-(-8)=0

We add all the numbers together, and all the variables

-1a-4=0

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

-a=4

a=4/-1

a=-4

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