Weare told that point "E" is located at the coordinates (n, 2) (where "n" is unknown), and are given the location of poind D and point C as shown below:
Notice that point D is also located at x = n (as point E is), but instead of 2 units sbove the x-axis, it is located at 2 units below the x-axis.
Then the distance between points E and D is 4 units.
Then if we are told that the distance between points C and D must be of the same value as the distance between points E and D, we know that such distance must be 4, and since C is on the y-axis (then x = 0) the position of point D must be in fact (4, -2)
Then please enter "4" as the distance requested, and "4" as well for the value of "n".