-2+2n=20

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Solution for -2+2n=20 equation: 



-2+2n=20

We move all terms to the left:

-2+2n-(20)=0

We add all the numbers together, and all the variables

2n-22=0

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

2n=22

n=22/2

n=11

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