12+(-4b)=-b

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Solution for 12+(-4b)=-b equation: 



12+(-4b)=-b

We move all terms to the left:

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

We add all the numbers together, and all the variables

(-4b)-(-1b)+12=0

We get rid of parentheses

-4b+1b+12=0

We add all the numbers together, and all the variables

-3b+12=0

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

-3b=-12

b=-12/-3

b=+4

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