Originally posted by knptmug at 2005-4-20 09:47 PM: T$ g% d k; l+ x4 n% [set small watermelon: x, middle watermelon y and big watermeton z ) r3 _$ v: w& n- c0 {/ K4 J6 c T$ \; s
two simultaneous equations are set up: " W' F/ F+ T8 o+ H8 M, d0.5x+2y+5z=50 (1) 5 E! H4 | M9 V; U8 [x+y+z=50 (2)* ]) }, D; `+ g
Equation(1) means that the total amount paid is equal t ...