-n+2n=8+1

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Solution for -n+2n=8+1 equation: 



-n+2n=8+1

We move all terms to the left:

-n+2n-(8+1)=0

We add all the numbers together, and all the variables

-n+2n-9=0

We add all the numbers together, and all the variables

n-9=0

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

n=9

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