81=n-19

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Solution for 81=n-19 equation: 



81=n-19

We move all terms to the left:

81-(n-19)=0

We get rid of parentheses

-n+19+81=0

We add all the numbers together, and all the variables

-1n+100=0

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

-n=-100

n=-100/-1

n=+100

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