Beth's ticket was $6.50. This is because if they both paid $23, we'll do the math finding X as the cost of Beth's ticket. We'll do it by 23=X+6.50. If we collect the like terms together, we'll have 23-6.50=X. The value of X we'll be 16.50. Since Beth's cost was cost less than an adult cost, we'll subtract it by $23 to give us $6.50.