Watson Education held a mathematics competition, with 12 questions in total, 10 points for each question answered correctly, and 5 points deducted for each wrong answer or failure to answer the question. Xiaohong finally scored 75 points. How many questions did Xiaohong answer correctly?
华生教育举行数学竞赛，共有12道题，每道题做对得10分，每做错或不做都扣5分．小红最后得了75分，小红答对了几道题？
<gadget id="calculator">12 * 10</gadget>
<output>120</output>

<gadget id="calculator">120 - 75</gadget>
<output>45</output>

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

<gadget id="calculator">45 / 15</gadget>
<output>3</output>

<gadget id="calculator">12 - 3</gadget>
<output>9</output>

<result>9</result>