 鲜花( 634)  鸡蛋( 5)
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Originally posted by knptmug at 2005-4-20 09:47 PM:
r/ x }3 D+ w; R/ K1 L# J X; [8 [set small watermelon: x, middle watermelon y and big watermeton z( u! ]% D9 x A, @% o, f, Y
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two simultaneous equations are set up:
/ y5 |) d- f0 J8 A0.5x+2y+5z=50 (1)8 ~8 [, v( A. z
x+y+z=50 (2)
5 p, q' B! o5 X. n* yEquation(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!3 r8 v y4 K9 N& _& 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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