The price of Stock A at 9 A.M. was ​$12.42. Since​ then, the price has been increasing at the rate of ​$0.12 each hour. At noon the price of Stock B was ​$12.92. It begins to decrease at the rate of ​$0.09 each hour. If the two rates​ continue, in how many hours will the prices of the two stocks be the​ same?