-4n+9=4n-9

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



-4n+9=4n-9

We move all terms to the left:

-4n+9-(4n-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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