12=a.7

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Solution for 12=a.7 equation: 



12=a.7

We move all terms to the left:

12-(a.7)=0

We add all the numbers together, and all the variables

-(+a.7)+12=0

We get rid of parentheses

-a.7+12=0

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

-a.7=-12

a=-12/1

a=-12

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