9+7n=9n-3

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Solution for 9+7n=9n-3 equation: 



9+7n=9n-3

We move all terms to the left:

9+7n-(9n-3)=0

We get rid of parentheses

7n-9n+3+9=0

We add all the numbers together, and all the variables

-2n+12=0

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

-2n=-12

n=-12/-2

n=+6

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