Two cars, passenger and freight, departed opposite each other from two places 225 kilometers apart at the same time, and met on the way 2.5 hours later. The speed of the truck is 48 kilometers per hour, what is the speed of the passenger car? (solution by equation)
客货两辆汽车同时从相距225千米的两地相对开出，2.5小时后在途中相遇．货车的速度是每小时48千米，客车的速度是多少？(用方程解)
<gadget id="calculator">2.5 * 48</gadget>
<output>120</output>

<gadget id="calculator">225 - 120</gadget>
<output>105</output>

<gadget id="calculator">105 / 2.5</gadget>
<output>42</output>

<result>42</result>