-21=3/7n

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Solution for -21=3/7n equation: 



-21=3/7n

We move all terms to the left:

-21-(3/7n)=0



Domain of the equation: 7n)!=0

n!=0/1

n!=0

n∈R



We add all the numbers together, and all the variables

-(+3/7n)-21=0

We get rid of parentheses

-3/7n-21=0

We multiply all the terms by the denominator


-21*7n-3=0

Wy multiply elements

-147n-3=0

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

-147n=3

n=3/-147

n=-1/49

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