Find x value for the point that splits segment CD in half if point C is located at (−2, 4) and point D is located at (3, 7).

The x value is 1/2, or 0.5

Just use the midpoint formula
(x2+x1)/2 , (y2+y1)/2

to find the midpoint. The x value would be (x2+x1)/2, so plug in the numbers.
(-2+3)/2 = 1/2