9=m+2m

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Solution for 9=m+2m equation: 



9=m+2m

We move all terms to the left:

9-(m+2m)=0

We add all the numbers together, and all the variables

-(+3m)+9=0

We get rid of parentheses

-3m+9=0

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

-3m=-9

m=-9/-3

m=+3

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