-2b=-7-b

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Solution for -2b=-7-b equation: 



-2b=-7-b

We move all terms to the left:

-2b-(-7-b)=0

We add all the numbers together, and all the variables

-2b-(-1b-7)=0

We get rid of parentheses

-2b+1b+7=0

We add all the numbers together, and all the variables

-1b+7=0

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

-b=-7

b=-7/-1

b=+7

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