 鲜花( 634)  鸡蛋( 5)
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Originally posted by knptmug at 2005-4-20 09:47 PM: n" h3 L; x1 a5 @8 D8 W, B. [3 K
set small watermelon: x, middle watermelon y and big watermeton z
, m X d0 g S: V
' s# K: y% ]0 ]+ c) V8 @two simultaneous equations are set up:- z/ X$ B# v! N$ P$ |
0.5x+2y+5z=50 (1)! f$ z+ C& |3 h
x+y+z=50 (2)3 C% U4 O: `/ g1 b
Equation(1) means that the total amount paid is equal t ...
5 [. R, n/ \+ t% o( x; B% r6 e! ?* W:lol::lol:7 H/ s) _! {4 e' I1 E2 b! N
楼主的标题就是给你写的!% S# h, p- Z% r$ P) Z% u% Y
你看看我们智力超群的同学们回答的都多好啊! |
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