The members of the ground control room of the lunar landing operation consisted of two groups of experts, with a total of 125 experts in the two groups. It turned out that the first group had more people, so 20 people were transferred from the first group to the second group. Even so, the number of the first group was still 5 more than the second group. How many experts were there in the first group?
登月行动地面控制室的成员由两组专家组成，两组共有专家125名．原来第一组人数较多，所以从第一组调了20名到第二组，即使这样第一组人数仍比第二组多5名．原来第一组有多少名专家？
<gadget id="calculator">20 + 145 + 5</gadget>
<output>170</output>

<gadget id="calculator">1 + 1</gadget>
<output>2</output>

<gadget id="calculator">170 / 2</gadget>
<output>85</output>

<result>85</result>