Originally posted by knptmug at 2005-4-20 09:47 PM: ; n) g- R B* v. N# Q5 X# i' Aset small watermelon: x, middle watermelon y and big watermeton z * j- ]+ ?! O& a/ y& ?+ C) ~ R/ ] - Y2 o4 f1 k1 s$ p5 ?( ?' \3 F- Gtwo simultaneous equations are set up:4 G' C+ y8 u' `0 _, x I' z
0.5x+2y+5z=50 (1) + T7 v! ?5 ~6 Z H5 f: z* z- P/ `x+y+z=50 (2)6 @& [$ A. \* l
Equation(1) means that the total amount paid is equal t ...