18=n*21

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Solution for 18=n*21 equation: 



18=n*21

We move all terms to the left:

18-(n*21)=0

We add all the numbers together, and all the variables

-(+n*21)+18=0

We get rid of parentheses

-n*21+18=0

Wy multiply elements

-21n+18=0

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

-21n=-18

n=-18/-21

n=6/7

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