-28+21m=7(3m-4)

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Solution for -28+21m=7(3m-4) equation: 



-28+21m=7(3m-4)

We move all terms to the left:

-28+21m-(7(3m-4))=0



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

7(3m-4)

We multiply parentheses

21m-28

Back to the equation:

-(21m-28)



We get rid of parentheses

21m-21m+28-28=0

We add all the numbers together, and all the variables

=0

m=0/1

m=0

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