21=3+4n+5n+

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



21=3+4n+5n+

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(+9n)+21=0

We get rid of parentheses

-9n+21=0

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

-9n=-21

n=-21/-9

n=2+1/3

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