The average score of a student in the three exams is 93 points, one of which is 100 points, and the difference between the scores of the other two is 5 points, what is the lowest score of the student's three exams?
某同学在三次考试中的得分的平均值为93分，其中一次得满分100分，另两次的分差为5分，则该同学的三次成绩中最低的是多少分．
<gadget id="calculator">93 * 3</gadget>
<output>279</output>

<gadget id="calculator">279 - 100</gadget>
<output>179</output>

<gadget id="calculator">179 - 5</gadget>
<output>174</output>

<gadget id="calculator">174 / 2</gadget>
<output>87</output>

<result>87</result>