set of data is arranged in ascending order as 27, 29, 38, x, 41, 48, 54, 58, and the median is 42, then what is x
一组数据按从小到大的顺序排列为27、29、38、x、41、48、54、58，中位数为42，则x为多少
<gadget id="calculator">42 * 2</gadget>
<output>84</output>

<gadget id="calculator">84 - 41</gadget>
<output>43</output>

<result>43</result>