-3m=40+7m

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Solution for -3m=40+7m equation: 



-3m=40+7m

We move all terms to the left:

-3m-(40+7m)=0

We add all the numbers together, and all the variables

-3m-(7m+40)=0

We get rid of parentheses

-3m-7m-40=0

We add all the numbers together, and all the variables

-10m-40=0

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

-10m=40

m=40/-10

m=-4

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