Two passenger cars, A and B, start from two places 1207 kilometers apart. Car A travels 72 kilometers per hour. After 8.5 hours, how many kilometers does car B travel per hour? (solution by equation)
甲、乙两辆客车分别从相距1207千米的两地相向开出，甲车每小时行72千米，经过8.5小时相遇，乙车每小时行多少千米？(用方程解)
<gadget id="calculator">72 * 8.5</gadget>
<output>612</output>

<gadget id="calculator">1_207 - 612</gadget>
<output>595</output>

<gadget id="calculator">595 / 8.5</gadget>
<output>70</output>

<result>70</result>