9n+3n+3+6=99

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Solution for 9n+3n+3+6=99 equation: 



9n+3n+3+6=99

We move all terms to the left:

9n+3n+3+6-(99)=0

We add all the numbers together, and all the variables

12n-90=0

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

12n=90

n=90/12

n=7+1/2

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