There are 26 people in our class who participated in the music interest group and 28 people who participated in the art interest group, 8 of whom participated in both groups. How many people participated in these two interest groups?
我们班参加音乐兴趣小组的26人，参加美术兴趣小组的有28人，其中8人两组都参加，参加这两个兴趣小组的一共有多少人？
<gadget id="calculator">28 - 8</gadget>
<output>20</output>

<gadget id="calculator">26 + 20</gadget>
<output>46</output>

<result>46</result>