Originally posted by knptmug at 2005-4-20 09:47 PM:1 I2 X4 q- h" j% f
set small watermelon: x, middle watermelon y and big watermeton z! t& f! D7 u! q W
, w; t/ ?/ l1 b# _6 i0 ~9 g' mtwo simultaneous equations are set up: 1 {$ C5 i# ]/ K' r0.5x+2y+5z=50 (1) " }8 B) G. C& T: q1 ]5 h* |$ k8 Ox+y+z=50 (2) # J" f+ J" N Z6 C \& Y% }4 GEquation(1) means that the total amount paid is equal t ...