-7+b=2(7-b)

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Solution for -7+b=2(7-b) equation: 



-7+b=2(7-b)

We move all terms to the left:

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

We add all the numbers together, and all the variables

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



We calculate terms in parentheses: -(2(-1b+7)), so:

2(-1b+7)

We multiply parentheses

-2b+14

Back to the equation:

-(-2b+14)



We get rid of parentheses

b+2b-14-7=0

We add all the numbers together, and all the variables

3b-21=0

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

3b=21

b=21/3

b=7

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