Contact us
Choose a category below so we can get back to you as quickly as possible.
六一班男x人,女y,六二班人數z 2x+5=3y x+y+2=z z+10=3y 解得x=26 y=19 z=47
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.