6+n+n=20

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Solution for 6+n+n=20 equation: 



6+n+n=20

We move all terms to the left:

6+n+n-(20)=0

We add all the numbers together, and all the variables

2n-14=0

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

2n=14

n=14/2

n=7

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