-28=-7(3x+4)

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Solution for -28=-7(3x+4) equation: 



-28=-7(3x+4)

We move all terms to the left:

-28-(-7(3x+4))=0



We calculate terms in parentheses: -(-7(3x+4)), so:

-7(3x+4)

We multiply parentheses

-21x-28

Back to the equation:

-(-21x-28)



We get rid of parentheses

21x+28-28=0

We add all the numbers together, and all the variables

21x=0

x=0/21

x=0

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