The school shipped 25 tons of cement, which was 18 tons more than 20% of the yellow sand. How many tons of yellow sand were shipped? (solution with equation)
学校运来25吨水泥，比黄沙的20%多18吨，运来黄沙多少吨？(用方程解答)
<gadget id="calculator">25 - 18</gadget>
<output>7</output>

<gadget id="calculator">7 / 0.2</gadget>
<output>35</output>

<result>35</result>