Posted by Terry on Sunday, August 28, 2011 at 1:41pm.
PQ = 8, PR = 12. P(2,0), M(X,0), Q(X1,0),R(X2,0). X2 - 2 = 12, X2 = 14. X2 - 2 = 2(X-2), 12 = 2X - 4, 2X = 16, X = 8. M(8,0) = Coordinates of mid-point.