-9=-8n+7

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Solution for -9=-8n+7 equation: 



-9=-8n+7

We move all terms to the left:

-9-(-8n+7)=0

We get rid of parentheses

8n-7-9=0

We add all the numbers together, and all the variables

8n-16=0

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

8n=16

n=16/8

n=2

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