28=7m-3m

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Solution for 28=7m-3m equation: 



28=7m-3m

We move all terms to the left:

28-(7m-3m)=0

We add all the numbers together, and all the variables

-(+4m)+28=0

We get rid of parentheses

-4m+28=0

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

-4m=-28

m=-28/-4

m=+7

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