Contact us
Choose a category below so we can get back to you as quickly as possible.
設這件商品的成本價為x元, 由題意得x(1+20%)×90%=270 解得x=250 答:這件商品的價格是250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.