9-3m=3m-12

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Solution for 9-3m=3m-12 equation: 



9-3m=3m-12

We move all terms to the left:

9-3m-(3m-12)=0

We get rid of parentheses

-3m-3m+12+9=0

We add all the numbers together, and all the variables

-6m+21=0

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

-6m=-21

m=-21/-6

m=3+1/2

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