After the elder brother gave the younger brother 2 pencils, there are still 5 pencils left. At this time, the two have the same number of pencils. How many pencils did the younger brother originally have?
哥哥给了弟弟2支铅笔后还剩5支，这时两人的铅笔一样多，弟弟原来有铅笔多少支．
<gadget id="calculator">5 - 2</gadget>
<output>3</output>

<result>3</result>