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-12=28-5m
We move all terms to the left:
-12-(28-5m)=0
We add all the numbers together, and all the variables
-(-5m+28)-12=0
We get rid of parentheses
5m-28-12=0
We add all the numbers together, and all the variables
5m-40=0
We move all terms containing m to the left, all other terms to the right
5m=40
m=40/5
m=8
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