Let X,Y, and Z be points such that \(\frac{XZ}{XY} = \frac{ZY}{XY} = \frac{1}{2}.\)If \(Y = (1, 7) \), \(Z = (-1, -7)\), then what is the sum of the coordinates of X?
The sum of the coordinates is 3 + 8 = 11.
-3-21 = -24
+161 
