12=-4b-8b

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Solution for 12=-4b-8b equation: 



12=-4b-8b

We move all terms to the left:

12-(-4b-8b)=0

We add all the numbers together, and all the variables

-(-12b)+12=0

We get rid of parentheses

12b+12=0

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

12b=-12

b=-12/12

b=-1

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