3(m-3)=21

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Solution for 3(m-3)=21 equation: 



3(m-3)=21

We move all terms to the left:

3(m-3)-(21)=0

We multiply parentheses

3m-9-21=0

We add all the numbers together, and all the variables

3m-30=0

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

3m=30

m=30/3

m=10

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