Lulu participated in a mathematics quiz. The rule is that every correct question gets 5 points, and every wrong question is deducted 3 points. If she doesn’t do it, she will get 0 points. She has completed 20 questions and got a total of 68 points. How many questions did she get right?
璐璐参加一次数学智力竞赛，规则是每做对一题得5分，错一题扣3分，不做记0分，她做完了20题，一共得了68分，她做对了多少题．
<gadget id="calculator">68 + 60</gadget>
<output>128</output>

<gadget id="calculator">128 / 8</gadget>
<output>16</output>

<result>16</result>