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450+40m=975-45m+20m
We move all terms to the left:
450+40m-(975-45m+20m)=0
We add all the numbers together, and all the variables
40m-(-25m+975)+450=0
We get rid of parentheses
40m+25m-975+450=0
We add all the numbers together, and all the variables
65m-525=0
We move all terms containing m to the left, all other terms to the right
65m=525
m=525/65
m=8+1/13
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