9n-20=12n+19

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Solution for 9n-20=12n+19 equation: 



9n-20=12n+19

We move all terms to the left:

9n-20-(12n+19)=0

We get rid of parentheses

9n-12n-19-20=0

We add all the numbers together, and all the variables

-3n-39=0

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

-3n=39

n=39/-3

n=-13

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