4n-9=9-4n

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Solution for 4n-9=9-4n equation: 



4n-9=9-4n

We move all terms to the left:

4n-9-(9-4n)=0

We add all the numbers together, and all the variables

4n-(-4n+9)-9=0

We get rid of parentheses

4n+4n-9-9=0

We add all the numbers together, and all the variables

8n-18=0

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

8n=18

n=18/8

n=2+1/4

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