Xiaoqiao has 15 yuan, and after giving Xiaoya 3 yuan, the money between the two is equal. How much money does Xiaoya have?
小巧有15元，给小亚3元后，两人的钱相等，小亚有多少钱？
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">15 - 6</gadget>
<output>9</output>

<result>9</result>