21+5m=7(5m+3)

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Solution for 21+5m=7(5m+3) equation: 



21+5m=7(5m+3)

We move all terms to the left:

21+5m-(7(5m+3))=0



We calculate terms in parentheses: -(7(5m+3)), so:

7(5m+3)

We multiply parentheses

35m+21

Back to the equation:

-(35m+21)



We get rid of parentheses

5m-35m-21+21=0

We add all the numbers together, and all the variables

-30m=0

m=0/-30

m=0

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