Answer: The number is 10.
Explanation:
The opposite of a number A is -A.
Then, the opposite of 10 is -10.
The opposite of the opposite of 10 is -(-10) = (-1)*(-1)*10 = 10
then in the number line we have that the number we wanted to find is located at:
-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10