In a quick-answer competition, 10 points were added for each correct answer, and 5 points were deducted for each wrong answer. Lan Lan answered 12 questions in total and got 60 points. How many questions did she answer correctly?
在一次抢答比赛中，每答对一题加10，答错一题扣5分，兰兰共抢答了12题，得到60分，她答对了几题？
<gadget id="calculator">12 * 10</gadget>
<output>120</output>

<gadget id="calculator">120 - 60</gadget>
<output>60</output>

<gadget id="calculator">10 + 5</gadget>
<output>15</output>

<gadget id="calculator">60 / 15</gadget>
<output>4</output>

<gadget id="calculator">12 - 4</gadget>
<output>8</output>

<result>8</result>