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8m-40=-4m-8
We move all terms to the left:
8m-40-(-4m-8)=0
We get rid of parentheses
8m+4m+8-40=0
We add all the numbers together, and all the variables
12m-32=0
We move all terms containing m to the left, all other terms to the right
12m=32
m=32/12
m=2+2/3
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