4=216/(3n+9)

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Solution for 4=216/(3n+9) equation: 



4=216/(3n+9)

We move all terms to the left:

4-(216/(3n+9))=0



Domain of the equation: (3n+9))!=0

n∈R



We multiply all the terms by the denominator


-(216+4*(3n+9))=0



We calculate terms in parentheses: -(216+4*(3n+9)), so:

216+4*(3n+9)

determiningTheFunctionDomain
4*(3n+9)+216

We multiply parentheses

12n+36+216

We add all the numbers together, and all the variables

12n+252

Back to the equation:

-(12n+252)



We get rid of parentheses

-12n-252=0

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

-12n=252

n=252/-12

n=-21

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