7=a+12a=12

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Solution for 7=a+12a=12 equation: 



7=a+12a=12

We move all terms to the left:

7-(a+12a)=0

We add all the numbers together, and all the variables

-(+13a)+7=0

We get rid of parentheses

-13a+7=0

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

-13a=-7

a=-7/-13

a=7/13

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