Jery sells children's tickets for half the adult ticket price. if 5 adult tickets and 8 childrens tickets cost a total of $27, what is the cost of an adult ticket?

We can calculate it by listing 2 equations

let x be children ticket price and y be adults

x = y/2. (1)

8x + 5y = 27 (2)

from (1), sub 1 into 2

8 (y/2) + 5y = 27

4y + 5y = 27

9y = 27

y = 3

using y = 3 we can go back to (1) and calculate x, but since y is already adult ticket, so we don't necessarily have to.

therefore adult ticket cost $3 each