Originally posted by knptmug at 2005-4-20 09:47 PM: 7 |3 @ h5 t) A) nset small watermelon: x, middle watermelon y and big watermeton z- @) `- N# ^( b3 W0 n& e
: M2 ~# d/ g% K! [- F2 I3 X5 p6 M) _) s2 r
two simultaneous equations are set up:; C/ i9 a% L' J6 F6 {7 A
0.5x+2y+5z=50 (1) 3 o% o0 U6 s- _& Z, I# Ix+y+z=50 (2)# P- l8 P# H( B @
Equation(1) means that the total amount paid is equal t ...