A section of road is 846 kilometers long. Two cars, A and B, are driving opposite each other. Car A travels 76 kilometers per hour. After 6 hours, the two cars meet. What is the speed of car B? (solution by equation)
一段路全长846千米，甲乙两辆汽车相对而行，甲车每小时行76千米，6小时后两车相遇，问乙车的速度是多少？(用方程解)
<gadget id="calculator">76 * 6</gadget>
<output>456</output>

<gadget id="calculator">846 - 456</gadget>
<output>390</output>

<gadget id="calculator">390 / 6</gadget>
<output>65</output>

<result>65</result>