15/21=r/120

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Solution for 15/21=r/120 equation: 



15/21=r/120

We move all terms to the left:

15/21-(r/120)=0

We add all the numbers together, and all the variables

-(+r/120)+15/21=0

We get rid of parentheses

-r/120+15/21=0

We calculate fractions

There is no solution for this equation

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