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20/8.7=5.8m
We move all terms to the left:
20/8.7-(5.8m)=0
We add all the numbers together, and all the variables
-(+5.8m)+20/8.7=0
We get rid of parentheses
-5.8m+20/8.7=0
We multiply all the terms by the denominator
-(5.8m)*8.7+20=0
We add all the numbers together, and all the variables
-(+5.8m)*8.7+20=0
We multiply parentheses
-43.5m+20=0
We move all terms containing m to the left, all other terms to the right
-43.5m=-20
m=-20/-43.5
m=20/43.5
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