12=-4a+2a,

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Solution for 12=-4a+2a, equation: 



12=-4a+2a.

We move all terms to the left:

12-(-4a+2a.)=0

We get rid of parentheses

4a-2a.+12=0

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

4a-2a.=-12

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