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0.4m=-1/5
We move all terms to the left:
0.4m-(-1/5)=0
We get rid of parentheses
0.4m+1/5=0
We multiply all the terms by the denominator
(0.4m)*5+1=0
We add all the numbers together, and all the variables
(+0.4m)*5+1=0
We multiply parentheses
0m+1=0
We add all the numbers together, and all the variables
m+1=0
We move all terms containing m to the left, all other terms to the right
m=-1
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