9m+18=11m-12

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Solution for 9m+18=11m-12 equation: 



9m+18=11m-12

We move all terms to the left:

9m+18-(11m-12)=0

We get rid of parentheses

9m-11m+12+18=0

We add all the numbers together, and all the variables

-2m+30=0

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

-2m=-30

m=-30/-2

m=+15

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