6-a=-12

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Solution for 6-a=-12 equation: 



6-a=-12

We move all terms to the left:

6-a-(-12)=0

We add all the numbers together, and all the variables

-1a+18=0

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

-a=-18

a=-18/-1

a=+18

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