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16m-8m-2m+3m-3m=12
We move all terms to the left:
16m-8m-2m+3m-3m-(12)=0
We add all the numbers together, and all the variables
6m-12=0
We move all terms containing m to the left, all other terms to the right
6m=12
m=12/6
m=2
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