-28=-4(b+-7)

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Solution for -28=-4(b+-7) equation: 



-28=-4(b+-7)

We move all terms to the left:

-28-(-4(b+-7))=0

We add all the numbers together, and all the variables

-(-4(b-7))-28=0



We calculate terms in parentheses: -(-4(b-7)), so:

-4(b-7)

We multiply parentheses

-4b+28

Back to the equation:

-(-4b+28)



We get rid of parentheses

4b-28-28=0

We add all the numbers together, and all the variables

4b-56=0

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

4b=56

b=56/4

b=14

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