9m+27=3m-21

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Solution for 9m+27=3m-21 equation: 



9m+27=3m-21

We move all terms to the left:

9m+27-(3m-21)=0

We get rid of parentheses

9m-3m+21+27=0

We add all the numbers together, and all the variables

6m+48=0

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

6m=-48

m=-48/6

m=-8

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