4/10=21/y

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Solution for 4/10=21/y equation: 



4/10=21/y

We move all terms to the left:

4/10-(21/y)=0



Domain of the equation: y)!=0

y!=0/1

y!=0

y∈R



We add all the numbers together, and all the variables

-(+21/y)+4/10=0

We get rid of parentheses

-21/y+4/10=0

We calculate fractions

There is no solution for this equation

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