Answer:
(17, -1)
Explanation:
|x - 8| + 6 = 15
Subtract 6 from both sides.
|x - 8| + 6 - 6 = 15 - 6
Then you simplify
|x - 8| = 9
Apply the absolute rule: for example, | u | = a, a > 0 then u = a or u = -a
x - 8 = -9 or x - 8 = 9
Which would come out to x = 17, -1
I hope that helps you understand how to solve it :)