JJ545

honbj

545.
            大概是
            

W                  3.5

A                   4

C                   4.5

mixture cost is twice as cost of w, mixture cost is third as cost of c问用a表达mixture cost.

 

三种nuts那道，告诉了a,c,w各多少钱每磅，一种mix含三种nuts,其中重量关系为c=2a,w=3a,算用a表示的总价，选最大的那个数，貌似是24点多a (同JJ271)

好象和原来给的关系不同 有弄清题意的吗? 谢谢