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