The point B is the midpoint of AC. Find the location of A if B=3 and C=17.

Answer 1

_{AB = BC = 17 -3 = 14,}

_{B - A = 14, A = B - 14 = 3 - 14 = - 11}

Answer 2

If B is the midpoint, then it must be equidistant from both A and C. Therefore, the average of A + C would = B

(A + 17)/2 = 3

Solve for A and that will be your point.