Two fast and slow trains depart from two cities 623 kilometers apart at the same time, and meet after 3.5 hours. The fast train travels 95 kilometers per hour, how many kilometers per hour does the slow train travel? (solution by equation)
快、慢两列火车从相距623千米的两个城市同时相对开出，经过3.5小时相遇．快车每小时行95千米，慢车每小时行多少千米？(用方程解)
<gadget id="calculator">95 * 3.5</gadget>
<output>332.5</output>

<gadget id="calculator">623 - 332.5</gadget>
<output>290.5</output>

<gadget id="calculator">290.5 / 3.5</gadget>
<output>83</output>

<result>83</result>