Two cars, A and B, drive in the opposite direction from a gas station at the same time. The distance between the two cars is 259.5 kilometers after driving for 3 hours. Car A travels 45.5 kilometers per hour. How many kilometers does car B travel per hour? (solution with equation)
甲乙两辆汽车同时从一个加油站反向行驶，行了3小时两车相距259.5千米，甲车每小时行45.5千米，乙车每小时行多少千米？(用方程解答)
<gadget id="calculator">45.5 * 3</gadget>
<output>136.5</output>

<gadget id="calculator">259.5 - 136.5</gadget>
<output>123</output>

<gadget id="calculator">123 / 3</gadget>
<output>41</output>

<result>41</result>