-8=3m+9

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Solution for -8=3m+9 equation: 



-8=3m+9

We move all terms to the left:

-8-(3m+9)=0

We get rid of parentheses

-3m-9-8=0

We add all the numbers together, and all the variables

-3m-17=0

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

-3m=17

m=17/-3

m=-5+2/3

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