12n-12n+2n+2n-2n=20

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Solution for 12n-12n+2n+2n-2n=20 equation: 



12n-12n+2n+2n-2n=20

We move all terms to the left:

12n-12n+2n+2n-2n-(20)=0

We add all the numbers together, and all the variables

2n-20=0

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

2n=20

n=20/2

n=10

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