-21/4=r-4/9

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Solution for -21/4=r-4/9 equation: 



-21/4=r-4/9

We move all terms to the left:

-21/4-(r-4/9)=0

We add all the numbers together, and all the variables

-(+r-4/9)-21/4=0

We get rid of parentheses

-r+4/9-21/4=0

We calculate fractions

There is no solution for this equation

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