n-4n+7=-20

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Solution for n-4n+7=-20 equation: 



n-4n+7=-20

We move all terms to the left:

n-4n+7-(-20)=0

We add all the numbers together, and all the variables

-3n+27=0

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

-3n=-27

n=-27/-3

n=+9

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