21/4=9/x

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Solution for 21/4=9/x equation: 



21/4=9/x

We move all terms to the left:

21/4-(9/x)=0



Domain of the equation: x)!=0

x!=0/1

x!=0

x∈R



We add all the numbers together, and all the variables

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

We get rid of parentheses

-9/x+21/4=0

We calculate fractions

There is no solution for this equation

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