 鲜花( 634)  鸡蛋( 5)
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Originally posted by knptmug at 2005-4-20 09:47 PM:
; p, O# y9 F$ a; K! kset small watermelon: x, middle watermelon y and big watermeton z
; N q$ X' Q F% o9 _
/ s1 a+ p( y0 [! g6 l4 d, Ntwo simultaneous equations are set up:: [0 a7 i0 |7 Z* |1 e7 ~' R
0.5x+2y+5z=50 (1)
* N4 [2 [% E2 h6 A1 g+ U% ux+y+z=50 (2)
9 ]% A, z# e, A2 @Equation(1) means that the total amount paid is equal t ... 1 e. K% f) N" D; D! \' i& S+ f9 ]
:lol::lol:
/ l8 _/ p6 g& n2 K楼主的标题就是给你写的!; F% F1 i) x: a( E
你看看我们智力超群的同学们回答的都多好啊! |
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