21=3/5n

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Solution for 21=3/5n equation: 



21=3/5n

We move all terms to the left:

21-(3/5n)=0



Domain of the equation: 5n)!=0

n!=0/1

n!=0

n∈R



We add all the numbers together, and all the variables

-(+3/5n)+21=0

We get rid of parentheses

-3/5n+21=0

We multiply all the terms by the denominator


21*5n-3=0

Wy multiply elements

105n-3=0

We move all terms containing n to the left, all other terms to the right

105n=3

n=3/105

n=1/35

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