21/3n+3n=4/5n+18

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Solution for 21/3n+3n=4/5n+18 equation: 



21/3n+3n=4/5n+18

We move all terms to the left:

21/3n+3n-(4/5n+18)=0



Domain of the equation: 3n!=0

n!=0/3

n!=0

n∈R





Domain of the equation: 5n+18)!=0

n∈R



We add all the numbers together, and all the variables

3n+21/3n-(4/5n+18)=0

We get rid of parentheses

3n+21/3n-4/5n-18=0

We calculate fractions


3n+105n/15n^2+(-12n)/15n^2-18=0

We multiply all the terms by the denominator


3n*15n^2+105n+(-12n)-18*15n^2=0

We add all the numbers together, and all the variables

105n+3n*15n^2+(-12n)-18*15n^2=0

Wy multiply elements

45n^3-270n^2+105n+(-12n)=0

We get rid of parentheses

45n^3-270n^2+105n-12n=0

We do not support enpression: n^3

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