There are x yellow flowers, 10 red flowers are 3 times more than yellow flowers, and there are 70 flowers in total. How many yellow flowers are there?
黄花有x朵，红花比黄花的3倍还多10朵，两种花一共70朵．黄花有多少朵？
<gadget id="calculator">70 - 10</gadget>
<output>60</output>

<gadget id="calculator">1 + 3</gadget>
<output>4</output>

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

<result>15</result>