A concert hall decided to hold a special concert for students during the summer vacation in early May. Admission tickets are divided into group tickets and retail tickets, of which group tickets account for the total number of votes. Solution: Suppose the total number of votes is A, and the ticket sales in June should be priced at X yuan per ticket, then there are:

In May, the number of group tickets sold is × a= a, and the ticket revenue is 12× a = a;

the number of retail tickets sold is× a = a, and the ticket revenue is 16× a = a;

June: the number of votes left in the group ticket is× a = a, and the income is 16× a = a;

The number of votes left in retail tickets is × a= a, and the revenue is × x = ax.

According to the meaning of the question, it is: a+ a= a+ ax,

The solution to the equation is: x = 19.2.

Therefore, retail tickets should be priced at 19.2 yuan each to make the ticket revenue of these two months even.