[讨论]2005年4月math讨论稿第6篇(81-93)

huawang

86....Juice, the first day add SAME AMOUNT WATER with the juice, the second day, add the twice water to juice than the first day. the revenus for two days are the same. On the first day, each cup of juice is $0.6/cup, how much one cup of juice on the second day?

【思路】设第一天有2x cups(一份水加一份juice),则第二天有3x cups(两份水加一份juice).

2x*0.6=3x.new priceè new price=0.4

这题给的是$0.6/cup，在不知道卖出多少cup的情况下能这样算吗？

gujianp2002

gujianp2002

EASYSUMMER

      楼上要选A吧,,,, 90, 196,and 300分别分解因式就好了