N-9=-2n+9

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Solution for N-9=-2n+9 equation: 



-9=-2N+9

We move all terms to the left:

-9-(-2N+9)=0

We get rid of parentheses

2N-9-9=0

We add all the numbers together, and all the variables

2N-18=0

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

2N=18

N=18/2

N=9

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