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2.1-0.25m=9
We move all terms to the left:
2.1-0.25m-(9)=0
We add all the numbers together, and all the variables
-0.25m-6.9=0
We move all terms containing m to the left, all other terms to the right
-0.25m=6.9
m=6.9/-0.25
m=-27+0.15/0.25
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