Originally posted by knptmug at 2005-4-20 09:47 PM: ( N/ ?: F5 \$ ]* K1 a) s6 Tset small watermelon: x, middle watermelon y and big watermeton z % G; Z, f& O( |+ F2 ]7 b$ ?- o3 Q* N; }" j" W9 a( `/ }
two simultaneous equations are set up:! r& [9 L+ u- g/ ]( M; B
0.5x+2y+5z=50 (1)1 |+ v; P' p/ D( F# \
x+y+z=50 (2): H5 y: p2 \* L1 I J5 Q6 e6 o, T
Equation(1) means that the total amount paid is equal t ...
; ?+ \$ k# }) @6 {$ b |:lol::lol:" e9 g* }5 Y% p; z3 w
楼主的标题就是给你写的! 7 b4 a* S v# j! R) M. p2 ]你看看我们智力超群的同学们回答的都多好啊!