A and B are traveling by plane, and their luggage weighs 94 kg in total. Because the luggage is overweight, A pays 1.5 yuan, and B pays 2 yuan. If A travels alone with all the luggage, he needs to pay 13.5 yuan. How much luggage can each passenger carry for free?
甲乙两人坐飞机旅行，两人的行李重量人共为94千克，因为行李超重，甲付了1.5元，乙付了2元．如果甲一个人带着全部行李旅行的话，则需付出13.5元，问每位旅客可免费携带多少行李？
<gadget id="calculator">1.5 + 2</gadget>
<output>3.5</output>

<gadget id="calculator">13.5 - 3.5</gadget>
<output>10</output>

<gadget id="calculator">13.5 + 10</gadget>
<output>23.5</output>

<gadget id="calculator">94 / 23.5</gadget>
<output>4</output>

<gadget id="calculator">4 * 10</gadget>
<output>40</output>

<result>40</result>