-1-2n=7

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Solution for -1-2n=7 equation: 



-1-2n=7

We move all terms to the left:

-1-2n-(7)=0

We add all the numbers together, and all the variables

-2n-8=0

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

-2n=8

n=8/-2

n=-4

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