Question

On the first day of a music concert, the price of 12 adult tickets and 4 child tickets is 84$. The second day the concert made 78$ by selling 6 adult tickets and 14 child tickets. Find the price of an adult ticket and the price of an child ticket.

Answer 1

12x + 4y = 84

6x + 14y = 78

12x + 4y = 84

-12x - 28y = -156

-24y = -72

y = $3 child ticket

12x + 12 = 84

12x = 72

x = $6 adult ticket

Explanation: