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7.5m=480+8m
We move all terms to the left:
7.5m-(480+8m)=0
We add all the numbers together, and all the variables
7.5m-(8m+480)=0
We get rid of parentheses
7.5m-8m-480=0
We add all the numbers together, and all the variables
-0.5m-480=0
We move all terms containing m to the left, all other terms to the right
-0.5m=480
m=480/-0.5
m=-960
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