28-3b=-4(5b-7)

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Solution for 28-3b=-4(5b-7) equation: 



28-3b=-4(5b-7)

We move all terms to the left:

28-3b-(-4(5b-7))=0



We calculate terms in parentheses: -(-4(5b-7)), so:

-4(5b-7)

We multiply parentheses

-20b+28

Back to the equation:

-(-20b+28)



We get rid of parentheses

-3b+20b-28+28=0

We add all the numbers together, and all the variables

17b=0

b=0/17

b=0

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