The road between A and B is 1650 kilometers long. A passenger car travels from A to B at a speed of 80 kilometers per hour, and a freight train travels from B to A at a speed of 70 kilometers per hour. Two cars start at the same time, how many hours later will the two cars meet? (solution by equation)
甲、乙两站之间的公路长1650千米，一列客车以每小时80千米的速度从甲站开往乙站，一列货车以每小时70千米的速度从乙站开往甲站．两车同时出发，几小时后两车相遇？(用方程解)
<gadget id="calculator">80 + 70</gadget>
<output>150</output>

<gadget id="calculator">1_650 / 150</gadget>
<output>11</output>

<result>11</result>