21/2=r-4/5

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Solution for 21/2=r-4/5 equation: 



21/2=r-4/5

We move all terms to the left:

21/2-(r-4/5)=0

We add all the numbers together, and all the variables

-(+r-4/5)+21/2=0

We get rid of parentheses

-r+4/5+21/2=0

We calculate fractions

There is no solution for this equation

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