-b=7-2b

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Solution for -b=7-2b equation: 



-b=7-2b

We move all terms to the left:

-b-(7-2b)=0

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-1b+2b-7=0

We add all the numbers together, and all the variables

b-7=0

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

b=7

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