In a math competition, there were 25 questions in total, 5 points were awarded for each correct answer, and 2 points were deducted for each wrong answer. Xiaohua got a total of 90 points. How many questions did Xiaohua get right?
在一次数学竞赛中，共有25道题，每做对一题得5分，每做错一题倒扣2分，小华共得了90分，小华做对了多少道题？
<gadget id="calculator">25 * 5</gadget>
<output>125</output>

<gadget id="calculator">125 - 90</gadget>
<output>35</output>

<gadget id="calculator">5 + 2</gadget>
<output>7</output>

<gadget id="calculator">35 / 7</gadget>
<output>5</output>

<gadget id="calculator">25 - 5</gadget>
<output>20</output>

<result>20</result>