12n+17=8n+21.

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Solution for 12n+17=8n+21. equation: 



12n+17=8n+21.

We move all terms to the left:

12n+17-(8n+21.)=0

We add all the numbers together, and all the variables

12n-(8n+21)+17=0

We get rid of parentheses

12n-8n-21+17=0

We add all the numbers together, and all the variables

4n-4=0

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

4n=4

n=4/4

n=1

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