20=-3n+2

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Solution for 20=-3n+2 equation: 



20=-3n+2

We move all terms to the left:

20-(-3n+2)=0

We get rid of parentheses

3n-2+20=0

We add all the numbers together, and all the variables

3n+18=0

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

3n=-18

n=-18/3

n=-6

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