The combined age of the two brothers this year is 55 years old. There was a year when the elder brother was the same age as the younger brother this year. At that time, the elder brother was exactly twice as old as the younger brother. How old is the elder brother this year?
今年哥俩的岁数加起来是55岁，曾经有一年，哥哥的岁数与今年弟弟的岁数相同，那时哥哥的岁数恰好是弟弟的2倍，哥哥今年多少岁．
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">55 / 5</gadget>
<output>11</output>

<gadget id="calculator">11 * 3</gadget>
<output>33</output>

<result>33</result>