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8+2.5m=4.5
We move all terms to the left:
8+2.5m-(4.5)=0
We add all the numbers together, and all the variables
2.5m+3.5=0
We move all terms containing m to the left, all other terms to the right
2.5m=-3.5
m=-3.5/2.5
m=-1+1/2.5
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