-7+7n=9n+9

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



-7+7n=9n+9

We move all terms to the left:

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

We get rid of parentheses

7n-9n-9-7=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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