Two cars leave from Station A at the same time. After 4.5 hours, car A lands 13.5 kilometers behind car B. It is known that car A travels 35 kilometers per hour, how many kilometers does car B travel per hour? (solution by equation)
两辆汽车同时从A站开出．经过4.5小时后，甲车落在乙车后面13.5千米处，已知甲车每小时行35千米，乙车每小时行多少千米？(用方程解)
<gadget id="calculator">35 * 4.5</gadget>
<output>157.5</output>

<gadget id="calculator">157.5 + 13.5</gadget>
<output>171</output>

<gadget id="calculator">171 / 4.5</gadget>
<output>38</output>

<result>38</result>