-9=7n-18+1

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Solution for -9=7n-18+1 equation: 



-9=7n-18+1

We move all terms to the left:

-9-(7n-18+1)=0

We add all the numbers together, and all the variables

-(7n-17)-9=0

We get rid of parentheses

-7n+17-9=0

We add all the numbers together, and all the variables

-7n+8=0

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

-7n=-8

n=-8/-7

n=1+1/7

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