Janet is trying to identity a number. She knows the following properties of the unknown number. The opposite of the unknown number is five. The absolute value of the unknown number is five. What number is Janet is trying to identity?

We know that the number's opposite is 5. In this context, the opposite means the negative of the given number. Since the number's opposite is 5, the number itself must be - 5. This is consistent with the second piece of information, since the absolute value of a number is its distance to 0 and the absolute value of - 5 is 5.