Originally posted by knptmug at 2005-4-20 09:47 PM:9 A" ?, i( H2 t
set small watermelon: x, middle watermelon y and big watermeton z ~. U, C0 W: a6 }3 I& V& G* M/ e& m1 {
two simultaneous equations are set up: " y! ]! C. N: ^8 A0.5x+2y+5z=50 (1) " h, N+ ^: a) k Dx+y+z=50 (2)/ I$ g# ~2 o0 @( F
Equation(1) means that the total amount paid is equal t ...