Originally posted by knptmug at 2005-4-20 09:47 PM: - ?. U! v% k' P3 z# R2 v6 mset small watermelon: x, middle watermelon y and big watermeton z* M' ?+ V" V- M C* P6 c& u
2 m5 i H6 r4 ^6 c+ w7 {$ @
two simultaneous equations are set up: - P0 o' O+ [8 ]# l8 C0.5x+2y+5z=50 (1)0 s2 M l$ ?0 ^4 T
x+y+z=50 (2); ^/ V4 _! L' z' @0 |$ f+ l
Equation(1) means that the total amount paid is equal t ...