Scott and Corey each had a collection of wind-up toys. Corey had 2/9 as many wind-up toys as Scott. When Scott lost 32 wind-up toys, Corey then had twice as many as Scott. How many wind-up toys were in Scott's collection at first?
c = 2/9 s
c = 2 ( s-32) these are given......sub in the first equation to the second
2/9 s = 2 (s-32)
2/9 s = 2s - 64
16/9 s = 64
s = 64 * 9 / 16 = 36 originally