3=2m/7+21

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Solution for 3=2m/7+21 equation: 



3=2m/7+21

We move all terms to the left:

3-(2m/7+21)=0

We get rid of parentheses

-2m/7-21+3=0

We multiply all the terms by the denominator


-2m-21*7+3*7=0

We add all the numbers together, and all the variables

-2m-126=0

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

-2m=126

m=126/-2

m=-63

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