7/5=21/n

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Solution for 7/5=21/n equation: 



7/5=21/n

We move all terms to the left:

7/5-(21/n)=0



Domain of the equation: n)!=0

n!=0/1

n!=0

n∈R



We add all the numbers together, and all the variables

-(+21/n)+7/5=0

We get rid of parentheses

-21/n+7/5=0

We calculate fractions

There is no solution for this equation

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