-n+20=100

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Solution for -n+20=100 equation: 



-n+20=100

We move all terms to the left:

-n+20-(100)=0

We add all the numbers together, and all the variables

-1n-80=0

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

-n=80

n=80/-1

n=-80

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