-42=7+7m

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Solution for -42=7+7m equation: 



-42=7+7m

We move all terms to the left:

-42-(7+7m)=0

We add all the numbers together, and all the variables

-(7m+7)-42=0

We get rid of parentheses

-7m-7-42=0

We add all the numbers together, and all the variables

-7m-49=0

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

-7m=49

m=49/-7

m=-7

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