-7b=-7(2b-3)

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Solution for -7b=-7(2b-3) equation: 



-7b=-7(2b-3)

We move all terms to the left:

-7b-(-7(2b-3))=0



We calculate terms in parentheses: -(-7(2b-3)), so:

-7(2b-3)

We multiply parentheses

-14b+21

Back to the equation:

-(-14b+21)



We get rid of parentheses

-7b+14b-21=0

We add all the numbers together, and all the variables

7b-21=0

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

7b=21

b=21/7

b=3

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