Question 267359
"Play tickets for two adults and two children cost $24" ___ 2a + 2c = 24 ___ 2a = 24 - 2c ___ a = 12 - c


"A child's ticket costs half as much as an adult's ticket" ___ c = a / 2 ___ 2c = a


substituting ___ 2c = 12 - c ___ 3c = 12 ___ c = 4