The sum of the weight of two students is 69 kg, one of them is 17 kg heavier than the other, how much is the heavier student in kg?
两名学生重量之和为69千克，其中一个比另一个重17千克，较重的学生多少千克．
<gadget id="calculator">69 + 17</gadget>
<output>86</output>

<gadget id="calculator">86 / 2</gadget>
<output>43</output>

<result>43</result>