Answer:
Explanation:
|x|= 9 is a solution. The range of the absolute value function is [0, infinity).
-|x|=9 not a solution. No absolute value function will return a negative result.
-|-x|=9 not a solution. -(x) = 9 is not true for x = 9.
-|-x|=-9 solution. -9 = -9 is true.