n-19=-2n+20

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Solution for n-19=-2n+20 equation: 



n-19=-2n+20

We move all terms to the left:

n-19-(-2n+20)=0

We get rid of parentheses

n+2n-20-19=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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