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-21=27-6m
We move all terms to the left:
-21-(27-6m)=0
We add all the numbers together, and all the variables
-(-6m+27)-21=0
We get rid of parentheses
6m-27-21=0
We add all the numbers together, and all the variables
6m-48=0
We move all terms containing m to the left, all other terms to the right
6m=48
m=48/6
m=8
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