20=n-3+4

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Solution for 20=n-3+4 equation: 



20=n-3+4

We move all terms to the left:

20-(n-3+4)=0

We add all the numbers together, and all the variables

-(n+1)+20=0

We get rid of parentheses

-n-1+20=0

We add all the numbers together, and all the variables

-1n+19=0

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

-n=-19

n=-19/-1

n=+19

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