 鲜花( 634)  鸡蛋( 5)
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Originally posted by knptmug at 2005-4-20 09:47 PM:, x7 Q8 {! j* `5 U7 A C
set small watermelon: x, middle watermelon y and big watermeton z! e; f: {: o" u7 X a7 d: v8 t, h
; b$ U( _6 t r8 Htwo simultaneous equations are set up:
/ O: Y( U {1 x6 x h1 P0.5x+2y+5z=50 (1)
, E& ]3 W& U; D. i5 A2 F# L- d- f: dx+y+z=50 (2)8 n1 k/ t) I2 W% L
Equation(1) means that the total amount paid is equal t ... ! ~, E A; M- q) S+ Z# _' X
:lol::lol:
% f9 F4 c1 {: W' W2 W+ I! L7 V+ e楼主的标题就是给你写的!
8 n1 L5 l$ m8 J5 Y* T你看看我们智力超群的同学们回答的都多好啊! |
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