Originally posted by knptmug at 2005-4-20 09:47 PM: $ d& [. c1 ]$ I6 `set small watermelon: x, middle watermelon y and big watermeton z9 g2 S9 A1 P/ {" n2 V! g2 @
! |; e1 x" E( h/ X. D
two simultaneous equations are set up: $ y+ d F# T, Z3 D* F: T0.5x+2y+5z=50 (1)3 h4 b; a, F8 \
x+y+z=50 (2)% G/ m7 G6 j0 {0 k
Equation(1) means that the total amount paid is equal t ...