N=20+n

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Solution for N=20+n equation: 



=20+N

We move all terms to the left:

-(20+N)=0

We add all the numbers together, and all the variables

-(N+20)=0

We get rid of parentheses

-N-20=0

We add all the numbers together, and all the variables

-1N-20=0

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

-N=20

N=20/-1

N=-20

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