Originally posted by knptmug at 2005-4-20 09:47 PM:! I# M( I9 X1 t9 p
set small watermelon: x, middle watermelon y and big watermeton z ; |1 h/ x" B& N: l+ @1 Q 0 m+ M8 R% ]) \' a! [* \) Ptwo simultaneous equations are set up: + h! p2 y/ z" M0.5x+2y+5z=50 (1) - r) W" ^' p( _5 Jx+y+z=50 (2)' R' ?: O6 n6 D. u9 n
Equation(1) means that the total amount paid is equal t ...
1 K7 J+ |( ~! A i5 S' B6 O:lol::lol:; T* f8 i2 T- X1 V5 N
楼主的标题就是给你写的!5 o/ m& C4 d" V7 J* Y, n
你看看我们智力超群的同学们回答的都多好啊!