Question

Simplify |x| - |-x|.

Answer 1

X-(-X)=X+X= 2X will be the answer.

Answer 2

In mathematics, the absolute value or modulus |x| of a real number x is the non-negative value of x without regard to its sign. Namely, |x| = x for a positive x, |x| = −x for a negative x (in which case −x is positive), and |0| = 0. For example, the absolute value of 3 is 3, and the absolute value of −3 is also 3. The absolute value of a number may be thought of as its distance from zero.

hence Ur answer is 2x