-9+9n=7n+7

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



-9+9n=7n+7

We move all terms to the left:

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

We get rid of parentheses

9n-7n-7-9=0

We add all the numbers together, and all the variables

2n-16=0

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

2n=16

n=16/2

n=8

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