3=4n-12-n

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Solution for 3=4n-12-n equation: 



3=4n-12-n

We move all terms to the left:

3-(4n-12-n)=0

We add all the numbers together, and all the variables

-(3n-12)+3=0

We get rid of parentheses

-3n+12+3=0

We add all the numbers together, and all the variables

-3n+15=0

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

-3n=-15

n=-15/-3

n=+5

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