 鲜花( 634)  鸡蛋( 5)
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Originally posted by knptmug at 2005-4-20 09:47 PM:+ h4 c0 s1 R, d4 ?. x5 t# H4 P5 R- F8 b: W
set small watermelon: x, middle watermelon y and big watermeton z
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two simultaneous equations are set up:! d, q% X' _8 P* v: {' c: ]6 G
0.5x+2y+5z=50 (1)/ m7 E! H$ w7 e# f+ N d! [( ~. d/ Y
x+y+z=50 (2)
) d# H6 E' N5 Z8 r( f: KEquation(1) means that the total amount paid is equal t ...
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楼主的标题就是给你写的!
4 w, F' c6 x ?3 D0 e/ \! k$ g/ V; \你看看我们智力超群的同学们回答的都多好啊! |
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