-28=-7(1+b)

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Solution for -28=-7(1+b) equation: 



-28=-7(1+b)

We move all terms to the left:

-28-(-7(1+b))=0

We add all the numbers together, and all the variables

-(-7(b+1))-28=0



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

-7(b+1)

We multiply parentheses

-7b-7

Back to the equation:

-(-7b-7)



We get rid of parentheses

7b+7-28=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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