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28=8+5m
We move all terms to the left:
28-(8+5m)=0
We add all the numbers together, and all the variables
-(5m+8)+28=0
We get rid of parentheses
-5m-8+28=0
We add all the numbers together, and all the variables
-5m+20=0
We move all terms containing m to the left, all other terms to the right
-5m=-20
m=-20/-5
m=+4
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