-12=2a+6

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Solution for -12=2a+6 equation: 



-12=2a+6

We move all terms to the left:

-12-(2a+6)=0

We get rid of parentheses

-2a-6-12=0

We add all the numbers together, and all the variables

-2a-18=0

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

-2a=18

a=18/-2

a=-9

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