3(7-3m)=9m+21

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Solution for 3(7-3m)=9m+21 equation: 



3(7-3m)=9m+21

We move all terms to the left:

3(7-3m)-(9m+21)=0

We add all the numbers together, and all the variables

3(-3m+7)-(9m+21)=0

We multiply parentheses

-9m-(9m+21)+21=0

We get rid of parentheses

-9m-9m-21+21=0

We add all the numbers together, and all the variables

-18m=0

m=0/-18

m=0

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