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78=+2m-6+m
We move all terms to the left:
78-(+2m-6+m)=0
We add all the numbers together, and all the variables
-(3m-6)+78=0
We get rid of parentheses
-3m+6+78=0
We add all the numbers together, and all the variables
-3m+84=0
We move all terms containing m to the left, all other terms to the right
-3m=-84
m=-84/-3
m=+28
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