-7=-3-m

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Solution for -7=-3-m equation: 



-7=-3-m

We move all terms to the left:

-7-(-3-m)=0

We add all the numbers together, and all the variables

-(-1m-3)-7=0

We get rid of parentheses

1m+3-7=0

We add all the numbers together, and all the variables

m-4=0

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

m=4

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