As we all know, the meaning of 5 = (5-0) on the number axis is the distance between the point of 5 and the origin (that is, the point of 0). What is the meaning of a + 4 on the number axis?

As we all know, the meaning of 5 = (5-0) on the number axis is the distance between the point of 5 and the origin (that is, the point of 0). What is the meaning of a + 4 on the number axis?

Represents the distance between point a and point-4