21=3+9n+5n

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Solution for 21=3+9n+5n equation: 



21=3+9n+5n

We move all terms to the left:

21-(3+9n+5n)=0

We add all the numbers together, and all the variables

-(14n+3)+21=0

We get rid of parentheses

-14n-3+21=0

We add all the numbers together, and all the variables

-14n+18=0

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

-14n=-18

n=-18/-14

n=1+2/7

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