Question

For which equations is x = 9 a possible solution?

|x|= 9
-|x|=9
-|-x|=9
-|-x|=-9
|x|=-9
|-x|=9
|-x|=-9

Answer 1

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.