$\"\"$

Let the unknown number is $\"\"$ .

The word $\"\"$ the opposite of a number $\"\"$ $\"\"$ represents $\"\"$ .

The word $\"\"$ the opposite of the opposite of a number $\"\"$ $\"\"$ represents $\"\"$ .

The finally result obtain the same number $\"\"$ . $\"\"$

The opposite of the opposite of a number $\"\"$ is same number $\"\"$ .