a-(-6)=4a+12

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Solution for a-(-6)=4a+12 equation: 



a-(-6)=4a+12

We move all terms to the left:

a-(-6)-(4a+12)=0

We add all the numbers together, and all the variables

a-(4a+12)+6=0

We get rid of parentheses

a-4a-12+6=0

We add all the numbers together, and all the variables

-3a-6=0

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

-3a=6

a=6/-3

a=-2

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