Respuesta :
x is a distance of 4 units to the left of 0....
anything going to the left of 0 is LESS then 0 and is therefore, negative.
-x is a distance of 4 units to the left of 0
anything going to the left of 0 is LESS then 0 and is therefore, negative.
-x is a distance of 4 units to the left of 0