10/21=15/7x

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Solution for 10/21=15/7x equation: 



10/21=15/7x

We move all terms to the left:

10/21-(15/7x)=0



Domain of the equation: 7x)!=0

x!=0/1

x!=0

x∈R



We add all the numbers together, and all the variables

-(+15/7x)+10/21=0

We get rid of parentheses

-15/7x+10/21=0

We calculate fractions

There is no solution for this equation

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