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7-0.3m=3
We move all terms to the left:
7-0.3m-(3)=0
We add all the numbers together, and all the variables
-0.3m+4=0
We move all terms containing m to the left, all other terms to the right
-0.3m=-4
m=-4/-0.3
m=13+0.1/0.3
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