12=3n-18

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Solution for 12=3n-18 equation: 



12=3n-18

We move all terms to the left:

12-(3n-18)=0

We get rid of parentheses

-3n+18+12=0

We add all the numbers together, and all the variables

-3n+30=0

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

-3n=-30

n=-30/-3

n=+10

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