Originally posted by knptmug at 2005-4-20 09:47 PM: 9 N) l- q4 Y0 q' w9 r7 aset small watermelon: x, middle watermelon y and big watermeton z( p3 J. d$ z& p/ ~
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two simultaneous equations are set up: w( H& }1 Y: d+ Q' A! g& B0 y0.5x+2y+5z=50 (1) 3 K" s7 q9 L4 `' p+ cx+y+z=50 (2)3 Q4 W9 Q$ M8 z* h4 [- B1 D
Equation(1) means that the total amount paid is equal t ...