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0.12m+7.4=8.12
We move all terms to the left:
0.12m+7.4-(8.12)=0
We add all the numbers together, and all the variables
0.12m-0.72=0
We move all terms containing m to the left, all other terms to the right
0.12m=0.72
m=0.72/0.12
m=6
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