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1/5-3r/10=1/5
We move all terms to the left:
1/5-3r/10-(1/5)=0
We add all the numbers together, and all the variables
-3r/10+1/5-(+1/5)=0
We get rid of parentheses
-3r/10+1/5-1/5=0
We calculate fractions
There is no solution for this equation
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