Originally posted by knptmug at 2005-4-20 09:47 PM: # c' f0 ]4 C7 N: G7 H+ Cset small watermelon: x, middle watermelon y and big watermeton z : H# o; l( J9 @7 k! K6 y- h 7 Z0 U( B% H5 Y: \two simultaneous equations are set up: 0 k- ~; G, W4 i4 J2 x7 C0 ~( r4 V0.5x+2y+5z=50 (1)! t$ a. l% D. \( l1 k g8 P
x+y+z=50 (2)/ [ @# x: ^8 R% ~' A5 m
Equation(1) means that the total amount paid is equal t ...