Cars A and B drive towards each other at the same time from two places 390 kilometers apart and meet each other in 2.5 hours. Car A travels 80 kilometers per hour, how many kilometers per hour does Car B travel? (solution by equation)
甲、乙两辆汽车同时从相距390千米的两地相向开出，2.5小时相遇．甲车每小时行80千米，乙车每小时行多少千米？(用方程解)
<gadget id="calculator">80 * 2.5</gadget>
<output>200</output>

<gadget id="calculator">390 - 200</gadget>
<output>190</output>

<gadget id="calculator">190 / 2.5</gadget>
<output>76</output>

<result>76</result>