21=m/3+4

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Solution for 21=m/3+4 equation: 



21=m/3+4

We move all terms to the left:

21-(m/3+4)=0

We get rid of parentheses

-m/3-4+21=0

We multiply all the terms by the denominator


-m-4*3+21*3=0

We add all the numbers together, and all the variables

-1m+51=0

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

-m=-51

m=-51/-1

m=+51

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