3m-9m=18

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Solution for 3m-9m=18 equation: 



3m-9m=18

We move all terms to the left:

3m-9m-(18)=0

We add all the numbers together, and all the variables

-6m-18=0

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

-6m=18

m=18/-6

m=-3

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