Contact us
Choose a category below so we can get back to you as quickly as possible.
49+0.009*0.5X=18+0.04*0.5X 全部乘以1000得 49000+9*0.5x=18000+4*5x 49000+4.5x=18000+20x 15.5x=31000 x=2000
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.