 鲜花( 634)  鸡蛋( 5)
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Originally posted by knptmug at 2005-4-20 09:47 PM:
, I6 x y$ L! I* ~) Eset small watermelon: x, middle watermelon y and big watermeton z
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- N1 i* |' T# G5 ^, utwo simultaneous equations are set up:+ L5 B% O b' V/ y
0.5x+2y+5z=50 (1)
1 i* O8 E; D f ^: w5 G2 Q' c4 M' Xx+y+z=50 (2)
% y: Y8 s) G* c$ D: N0 F' q: E- c5 NEquation(1) means that the total amount paid is equal t ... % V, q2 I, G! J: h( u
:lol::lol:; k" d9 Y) p9 p- F) s- \
楼主的标题就是给你写的!
% |- F' R- T) E' h# {你看看我们智力超群的同学们回答的都多好啊! |
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