4 units to the left of 4?

draw your number line and mark it as usual

put your pencil on 4
now move 4 units to the left (subtract)
where are you now?

4 units to left = 4-4 = 0.

4 units to the right = 4+4 = 8.

To find a point that is 4 units to the left of a given point, you need to subtract 4 from the x-coordinate of the given point.

In this case, the given point is 4. So, to find a point that is 4 units to the left of 4, you subtract 4 from 4.

4 - 4 = 0

Therefore, a point that is 4 units to the left of 4 is (0, y), where y can be any value.