The school held two mathematics competitions. The number of people who passed the first competition was 3 times the number of people who failed or 4 more people. The number of people who passed the second time was 5 times more than the number of people who failed the first time. It is exactly 6 times the number of people who failed. What is the total number People participate in math competitions.
学校举行两次数学竞赛，第一次竞赛及格人数是不及格人数的3倍还多4人，第二次及格人数比第一次多5人，刚好是不及格人数的6倍，则共有多少人参加数学竞赛．
<gadget id="calculator">5 * 6</gadget>
<output>30</output>

<gadget id="calculator">30 + 4 + 5</gadget>
<output>39</output>

<gadget id="calculator">6 - 3</gadget>
<output>3</output>

<gadget id="calculator">39 / 3</gadget>
<output>13</output>

<gadget id="calculator">13 * 3</gadget>
<output>39</output>

<gadget id="calculator">39 + 4 + 13</gadget>
<output>56</output>

<result>56</result>