Originally posted by knptmug at 2005-4-20 09:47 PM:4 S7 c3 ~# K! ?4 |4 K
set small watermelon: x, middle watermelon y and big watermeton z, z/ c0 n( b2 D
1 {! R8 o5 ]0 b# _/ T1 L; ztwo simultaneous equations are set up: . v$ h) L$ [ m, u1 t1 a" U k0.5x+2y+5z=50 (1) & i8 [+ @) B* Qx+y+z=50 (2)# f# O" n1 G4 b f" F
Equation(1) means that the total amount paid is equal t ...
) w( L5 d# G6 @# M4 _:lol::lol: ( w5 A3 }% Y) m) y2 a楼主的标题就是给你写的!; @0 ^2 k- @6 w1 g+ l' v
你看看我们智力超群的同学们回答的都多好啊!