$\"\"$

The condition is $\"\"$ .

If $\"\"$ then $\"\"$ .

If $\"\"$ then $\"\"$ .

Let us assume $\"\"$ , then $\"\"$ . $\"\"$

The value of x is less than or equal to zero. \ \

If $\"\"$ , then |x|and x are opposites so their sum is 0. \ \

If $\"\"$ , then |x|and x are both 0 so their sum is 0. \ \