9-7n=-7-9n

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



9-7n=-7-9n

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-7n+9n+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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