20=n-19

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Solution for 20=n-19 equation: 



20=n-19

We move all terms to the left:

20-(n-19)=0

We get rid of parentheses

-n+19+20=0

We add all the numbers together, and all the variables

-1n+39=0

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

-n=-39

n=-39/-1

n=+39

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