18=3(n+2n)

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Solution for 18=3(n+2n) equation: 



18=3(n+2n)

We move all terms to the left:

18-(3(n+2n))=0

We add all the numbers together, and all the variables

-(3(+3n))+18=0



We calculate terms in parentheses: -(3(+3n)), so:

3(+3n)

We multiply parentheses

9n

Back to the equation:

-(9n)



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

-9n=-18

n=-18/-9

n=+2

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