8n+9=9n-3

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Solution for 8n+9=9n-3 equation: 



8n+9=9n-3

We move all terms to the left:

8n+9-(9n-3)=0

We get rid of parentheses

8n-9n+3+9=0

We add all the numbers together, and all the variables

-1n+12=0

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

-n=-12

n=-12/-1

n=+12

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