 鲜花( 634)  鸡蛋( 5)
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Originally posted by knptmug at 2005-4-20 09:47 PM:
' ^& k4 v2 R6 V! y0 {/ nset small watermelon: x, middle watermelon y and big watermeton z
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two simultaneous equations are set up:
|, v- Z' M! _$ |3 H3 q0.5x+2y+5z=50 (1)
, s& N0 s/ Q7 }8 P0 Rx+y+z=50 (2)
' r) A/ m& h2 `% L$ d) qEquation(1) means that the total amount paid is equal t ...
7 X, P& X* L, [' d( i1 ?9 ]5 G! N:lol::lol:1 B+ m8 ^9 e; M( U
楼主的标题就是给你写的!
/ Y3 X* ]0 q8 E1 q你看看我们智力超群的同学们回答的都多好啊! |
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