The distance between places A and B is 455 kilometers. Cars A and B drive from the two places at the same time, drive towards each other, and meet each other after 3.5 hours. Car B travels 68 kilometers per hour, how many kilometers per hour does Car A travel? (solution by equation)
A、B两地相距455千米，甲、乙两车同时从两地开出，相向而行，经过3.5小时相遇．乙车每小时行68千米，甲车每小时行多少千米？(用方程解)
<gadget id="calculator">3.5 * 68</gadget>
<output>238</output>

<gadget id="calculator">455 - 238</gadget>
<output>217</output>

<gadget id="calculator">217 / 3.5</gadget>
<output>62</output>

<result>62</result>