n+7=4n-20

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



n+7=4n-20

We move all terms to the left:

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

We get rid of parentheses

n-4n+20+7=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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