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28=3m+5-m-9
We move all terms to the left:
28-(3m+5-m-9)=0
We add all the numbers together, and all the variables
-(2m-4)+28=0
We get rid of parentheses
-2m+4+28=0
We add all the numbers together, and all the variables
-2m+32=0
We move all terms containing m to the left, all other terms to the right
-2m=-32
m=-32/-2
m=+16
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