Contact us
Choose a category below so we can get back to you as quickly as possible.
樓上的回答正確,那我就寫一下用方程式的方法吧 設原價為Y元 Y*80%-1000=240 解得,Y=1550元
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.