81=-7-8n

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Solution for 81=-7-8n equation: 



81=-7-8n

We move all terms to the left:

81-(-7-8n)=0

We add all the numbers together, and all the variables

-(-8n-7)+81=0

We get rid of parentheses

8n+7+81=0

We add all the numbers together, and all the variables

8n+88=0

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

8n=-88

n=-88/8

n=-11

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