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(-7.5)m=1/7
We move all terms to the left:
(-7.5)m-(1/7)=0
We add all the numbers together, and all the variables
(-7.5)m-(+1/7)=0
We multiply parentheses
-7.5m-(+1/7)=0
We get rid of parentheses
-7.5m-1/7=0
We multiply all the terms by the denominator
-(7.5m)*7-1=0
We add all the numbers together, and all the variables
-(+7.5m)*7-1=0
We multiply parentheses
-49m-1=0
We move all terms containing m to the left, all other terms to the right
-49m=1
m=1/-49
m=-1/49
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