A factory has two workshops, one workshop has 20 people. If 20 people are transferred from the second workshop to the first workshop, then the number of people in the first workshop will be 10 more than twice that of the second workshop. How many people were there in the second workshop?
某工厂有两个车间，一车间有20人．如果从二车间调20人到一车间，那么一车间的人数将比二车间的2倍还多10人．二车间原有多少人？
<gadget id="calculator">20 * 2</gadget>
<output>40</output>

<gadget id="calculator">20 - 10</gadget>
<output>10</output>

<gadget id="calculator">40 + 20 + 10</gadget>
<output>70</output>

<gadget id="calculator">70 / 2</gadget>
<output>35</output>

<result>35</result>