Luzhou is 725 kilometers away from Jiuzhaigou. At 2 pm, a bus goes from Luzhou to Jiuzhaigou, and a bus goes from Jiuzhaigou to Luzhou. The bus speed is 65 kilometers per hour, and the bus speed is 80 kilometers per hour. When do the two cars meet at night? Solution: Let two cars meet in x hours (65 80)X=725 145X=725X=5. According to the 24-hour clock, 2 pm is 14 pm, so: 14 5= 19 (dot) 19 pm is 7 pm. My opinion: the solution of the equation is right and the number is right. In the second step, don't change it to the 24-hour timing method, because the conditions directly give the timing method of 12 hours, "There is a bus leaving Luzhou for Jiuzhaigou at 2 pm", and the question is also asked by the timing method of 12 hours, and the answer can be obtained directly by 2 5 = 7.