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-20=5m+4-m
We move all terms to the left:
-20-(5m+4-m)=0
We add all the numbers together, and all the variables
-(4m+4)-20=0
We get rid of parentheses
-4m-4-20=0
We add all the numbers together, and all the variables
-4m-24=0
We move all terms containing m to the left, all other terms to the right
-4m=24
m=24/-4
m=-6
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