A candidate took several exams, and found in the last exam: If he took 95 points in this test, his average score is 89 points, if he took 79 points in this test, his average score is 87 points, this candidate has already taken the test How many exams.
某考生参加若干次考试，在最后一次考试时发现：如果这次考试他考95分，那么平均分为89分，如果这次他考79分，他平均分是87分，这个考生已参加了多少次考试．
<gadget id="calculator">95 - 79</gadget>
<output>16</output>

<gadget id="calculator">89 - 87</gadget>
<output>2</output>

<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<result>8</result>