Question

If 3x y and 18 are in arithmetic progression. Find the values of x and y

Answer 1

(18 + 3)/2 = 21/2 = 10.5

x = (3 + 10.5)/2 = 13.5/2 = 6.75

y = (10.5 + 18)/2 = 28.5/2 = 14.25