a-12a=84

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Solution for a-12a=84 equation: 



a-12a=84

We move all terms to the left:

a-12a-(84)=0

We add all the numbers together, and all the variables

-11a-84=0

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

-11a=84

a=84/-11

a=-7+7/11

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