2m-3(7-3m)=m-21.

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Solution for 2m-3(7-3m)=m-21. equation: 



2m-3(7-3m)=m-21.

We move all terms to the left:

2m-3(7-3m)-(m-21.)=0

We add all the numbers together, and all the variables

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

We multiply parentheses

2m+9m-(m-21)-21=0

We get rid of parentheses

2m+9m-m+21-21=0

We add all the numbers together, and all the variables

10m=0

m=0/10

m=0

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