3n-2n-n+2n+2=20

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Solution for 3n-2n-n+2n+2=20 equation: 



3n-2n-n+2n+2=20

We move all terms to the left:

3n-2n-n+2n+2-(20)=0

We add all the numbers together, and all the variables

2n-18=0

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

2n=18

n=18/2

n=9

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