The clothing store bought 280 meters of fabric, and the fabric was 60 meters more than the wool. How many meters of wool did you buy? (Solve by listing equations involving χ)
服装店买来布料280米，布料比毛料多60米，买来毛料多少米？(用列出含有χ的等式解答)
<gadget id="calculator">280 - 60</gadget>
<output>220</output>

<result>220</result>