Given:
Bus fare = 1.50
coupon book = 24
bus fare w/ coupon book = 0.50
let x be the number of bus rides.
1.50x = 0.50x + 24
1.50x - 0.50x = 24
1x = 24
x = 24
24 bus rides for both to have the same cost.
1.50x = 0.50x + 24
1.50(24) = 0.50(24) + 24
36 = 12 + 24
36 = 36