In the math class, Teacher Li assigned two questions. As a result, 34 people got the first question right; 46 people got the second question right; no one got both questions wrong. If there are 52 people in this class, how many people get both questions right?
数学课上，李老师布置了两道题，结果有34人答对了第一题；有46人做对了第二题；没有人两道题全部做错．如果这个班共有52人，那么两道题都做对的有多少人．
<gadget id="calculator">46 - 52</gadget>
<output>-6</output>

<gadget id="calculator">34 + (-6)</gadget>
<output>28</output>

<result>28</result>