-42=-7+5m

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Solution for -42=-7+5m equation: 



-42=-7+5m

We move all terms to the left:

-42-(-7+5m)=0

We add all the numbers together, and all the variables

-(5m-7)-42=0

We get rid of parentheses

-5m+7-42=0

We add all the numbers together, and all the variables

-5m-35=0

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

-5m=35

m=35/-5

m=-7

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