-7-3m+1=21

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Solution for -7-3m+1=21 equation: 



-7-3m+1=21

We move all terms to the left:

-7-3m+1-(21)=0

We add all the numbers together, and all the variables

-3m-27=0

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

-3m=27

m=27/-3

m=-9

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