Originally posted by knptmug at 2005-4-20 09:47 PM: 1 f& r% F) A7 h3 ?$ T$ W. }3 @set small watermelon: x, middle watermelon y and big watermeton z 5 c' Q& c+ j3 k2 p # d0 P5 e" L4 H4 G( Rtwo simultaneous equations are set up: 4 h& o6 Z6 K2 \" c4 @- s- _0.5x+2y+5z=50 (1) 2 T$ V* c- |% k: G1 Fx+y+z=50 (2)4 j6 ] J$ l7 h) i
Equation(1) means that the total amount paid is equal t ...
' g: q3 f5 D" p6 _9 x2 {; t* U
:lol::lol: % |2 R% i3 j! L0 g5 R, q T楼主的标题就是给你写的!- r9 u& M& j. [2 E
你看看我们智力超群的同学们回答的都多好啊!