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12.95+0.25m=21.20
We move all terms to the left:
12.95+0.25m-(21.20)=0
We add all the numbers together, and all the variables
0.25m+12.95-(21.2)=0
We add all the numbers together, and all the variables
0.25m-8.25=0
We move all terms containing m to the left, all other terms to the right
0.25m=8.25
m=8.25/0.25
m=33
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