3n=7n-20

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Solution for 3n=7n-20 equation: 



3n=7n-20

We move all terms to the left:

3n-(7n-20)=0

We get rid of parentheses

3n-7n+20=0

We add all the numbers together, and all the variables

-4n+20=0

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

-4n=-20

n=-20/-4

n=+5

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