12=66+3n

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Solution for 12=66+3n equation: 



12=66+3n

We move all terms to the left:

12-(66+3n)=0

We add all the numbers together, and all the variables

-(3n+66)+12=0

We get rid of parentheses

-3n-66+12=0

We add all the numbers together, and all the variables

-3n-54=0

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

-3n=54

n=54/-3

n=-18

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