Why is the negation of a negative number a positive number?

Let's use a scenario:

 You have 5 bucks (positive.)

You owe me 5 bucks (negative.) 

But if I said "You do not owe me 5 bucks," the amount of money you would have would be positive again. The double negative makes the statement positive.

Similarly, the double negative with a number makes it positive:

5 is positive.

-5 is negative.

-(-5) would be positive again.

kitty , that was really really a logical answer!i really liked your answer and i wish to give you a point!

I like that one, too !!!

yeah!and i liked this like the most " You owe me 5 bucks" i donno why but i just found this funny!and the idea of using bucks as an object is interesting!

Oh, deer . . .  Rosala, "5 bucks" is American slang for "5 dollars" :)

I liked you explanation to Kitty.

Your pun on 'deer' was cute too :))