12=4-8a

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Solution for 12=4-8a equation: 



12=4-8a

We move all terms to the left:

12-(4-8a)=0

We add all the numbers together, and all the variables

-(-8a+4)+12=0

We get rid of parentheses

8a-4+12=0

We add all the numbers together, and all the variables

8a+8=0

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

8a=-8

a=-8/8

a=-1

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