(28/4)=(21/n)

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Solution for (28/4)=(21/n) equation: 



(28/4)=(21/n)

We move all terms to the left:

(28/4)-((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=0

We multiply all the terms by the denominator


-((+21+7*n))=0



We calculate terms in parentheses: -((+21+7*n)), so:

(+21+7*n)

We add all the numbers together, and all the variables

(7n+21)

We get rid of parentheses

7n+21

Back to the equation:

-(7n+21)



We get rid of parentheses

-7n-21=0

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

-7n=21

n=21/-7

n=-3

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