Originally posted by knptmug at 2005-4-20 09:47 PM: 3 G: A5 C. S3 _4 K+ j/ h% bset small watermelon: x, middle watermelon y and big watermeton z 1 [: T7 c/ q, p v, T* M8 ~5 J+ ?9 I3 g9 {5 k' i4 T
two simultaneous equations are set up:! Q7 \. j" l$ U `% t& p- e7 ]
0.5x+2y+5z=50 (1). p" R3 j- C$ A! e
x+y+z=50 (2) 4 ^/ w3 q3 W1 _8 C* Y1 }Equation(1) means that the total amount paid is equal t ...
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