13n-21=17-3X

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Solution for 13n-21=17-3X equation: 



13n-21=17-3n

We move all terms to the left:

13n-21-(17-3n)=0

We add all the numbers together, and all the variables

13n-(-3n+17)-21=0

We get rid of parentheses

13n+3n-17-21=0

We add all the numbers together, and all the variables

16n-38=0

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

16n=38

n=38/16

n=2+3/8

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