太简单了吧? 6 U# Z O! ] }8 p2 n7 U2 B9 u6 H! N' S6 R# O. \: q
小西瓜1元2个, 一个就是5毛,50个就是 5*50, 五五三十五,三十五块买了50各西瓜, 15块小费。# h# F4 D& `- c7 p
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下一个问题,这50个西瓜怎么分?
Originally posted by knptmug at 2005-4-20 09:47 PM:& W: f: |* x" @: R% [
set small watermelon: x, middle watermelon y and big watermeton z 2 v* i5 {; j2 O) e4 b7 i/ W! ^$ L& W- n) ` B. h) ^* f
two simultaneous equations are set up: % H4 Q3 x9 ^0 X/ l) J0.5x+2y+5z=50 (1) , u( u; v- c. b. sx+y+z=50 (2)! }# M8 ]. H" _6 ~- b& _
Equation(1) means that the total amount paid is equal t ...
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:lol::lol:. k4 E9 c) h; }2 t5 w( ^8 v
楼主的标题就是给你写的! 5 j! C( a0 N; k你看看我们智力超群的同学们回答的都多好啊!