The store shipped 2400 kilograms of cabbage, and after selling some, there were 250 kilograms left. How many kilograms of cabbage were sold? (List the equations containing the unknown x, and then answer)
商店运来2400千克的白菜，卖了一些后，还剩250千克，卖了多少千克白菜？(列出含有未知数x的等式，再解答)
<gadget id="calculator">2_400 - 250</gadget>
<output>2_150</output>

<result>2_150</result>