3n+9+12=20

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Solution for 3n+9+12=20 equation: 



3n+9+12=20

We move all terms to the left:

3n+9+12-(20)=0

We add all the numbers together, and all the variables

3n+1=0

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

3n=-1

n=-1/3

n=-1/3

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