12-2b=-b

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Solution for 12-2b=-b equation: 



12-2b=-b

We move all terms to the left:

12-2b-(-b)=0

We add all the numbers together, and all the variables

-2b-(-1b)+12=0

We get rid of parentheses

-2b+1b+12=0

We add all the numbers together, and all the variables

-1b+12=0

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

-b=-12

b=-12/-1

b=+12

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