Originally posted by knptmug at 2005-4-20 09:47 PM: - a. X0 |5 V" H5 eset small watermelon: x, middle watermelon y and big watermeton z: y' c5 X8 f6 r- M& N6 ^: o- y
$ s( k; b2 R0 _$ N; l. }
two simultaneous equations are set up: Z0 c$ h0 Q; ]- Y2 R
0.5x+2y+5z=50 (1)! C+ d0 {3 ]/ ^
x+y+z=50 (2)& j7 Z2 L- M B' M8 z& W
Equation(1) means that the total amount paid is equal t ...