2n-n+3n=20

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



2n-n+3n=20

We move all terms to the left:

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

We add all the numbers together, and all the variables

4n-20=0

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

4n=20

n=20/4

n=5

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