81+n=9-7n

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Solution for 81+n=9-7n equation: 



81+n=9-7n

We move all terms to the left:

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

We add all the numbers together, and all the variables

n-(-7n+9)+81=0

We get rid of parentheses

n+7n-9+81=0

We add all the numbers together, and all the variables

8n+72=0

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

8n=-72

n=-72/8

n=-9

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