3n+20=4n-7

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Solution for 3n+20=4n-7 equation: 



3n+20=4n-7

We move all terms to the left:

3n+20-(4n-7)=0

We get rid of parentheses

3n-4n+7+20=0

We add all the numbers together, and all the variables

-1n+27=0

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

-n=-27

n=-27/-1

n=+27

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