2: 大人小孩买电影票那题, adult ticket is 7.5dollar, child ticket is 5dollar, 问买了多少小孩票?
(1)totally cost 55 dollars
(2) the number of child ticket is more than the number of aault ticket. 选E
这个题应该选C吧。
由条件(1) 7.5X+5Y=55 知 (4,1)(2,4)(6,2),由条件(2) 选 (2,4)
举报
发表回复
手机版|ChaseDream|GMT+8, 2025-5-25 20:05 京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号
ChaseDream 论坛
© 2003-2025 ChaseDream.com. All Rights Reserved.