m-4=8m+9

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Solution for m-4=8m+9 equation: 



m-4=8m+9

We move all terms to the left:

m-4-(8m+9)=0

We get rid of parentheses

m-8m-9-4=0

We add all the numbers together, and all the variables

-7m-13=0

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

-7m=13

m=13/-7

m=-1+6/7

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