Absolute value is when any value that's inside the box, positive or negative, will always come out as positive. For this one, you solve it as a normal equation, solving for x. So, 8 = 5 - x 8-5 = 5-5 - x 3 = -x x = -3 One value can be -3 To find the other value, just find any value that's equal to 8 when added or subtracted from 5, negative or positive. We have 13 in this case. 5 - 13 is equals to -8 but since it's absolute value, it would be positive 8. So, the answer is D