Question

75 is 5/2 of greg's age
Reiny
greg's age ---- x

(5/2)x = 75
times 2
5x = 150
x = 30

Ms. Sue
(5/2)x = 75

x = 75 / (5/2)

x = 75 * (2/5)

x = 150/5 = 30