-1+2n=9

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Solution for -1+2n=9 equation: 



-1+2n=9

We move all terms to the left:

-1+2n-(9)=0

We add all the numbers together, and all the variables

2n-10=0

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

2n=10

n=10/2

n=5

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