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15-3.7m=12.4-2.5m
We move all terms to the left:
15-3.7m-(12.4-2.5m)=0
We add all the numbers together, and all the variables
-3.7m-(-2.5m+12.4)+15=0
We get rid of parentheses
-3.7m+2.5m-12.4+15=0
We add all the numbers together, and all the variables
-1.2m+2.6=0
We move all terms containing m to the left, all other terms to the right
-1.2m=-2.6
m=-2.6/-1.2
m=2+0.2/1.2
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