-12=12-4a

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Solution for -12=12-4a equation: 



-12=12-4a

We move all terms to the left:

-12-(12-4a)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

4a-12-12=0

We add all the numbers together, and all the variables

4a-24=0

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

4a=24

a=24/4

a=6

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