 鲜花( 634)  鸡蛋( 5)
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Originally posted by knptmug at 2005-4-20 09:47 PM:
, I" y7 ^! `8 ?5 J# H; P0 Sset small watermelon: x, middle watermelon y and big watermeton z
( y' J5 o3 O2 A) z
+ r: A, U6 b0 |' M9 y$ |% a7 Ztwo simultaneous equations are set up:% N; u# I7 K" c, w5 S# Y
0.5x+2y+5z=50 (1)4 _ ~7 k m! e- u% c* t/ T
x+y+z=50 (2)
+ h( v, L- h( d+ p9 l$ ]& @Equation(1) means that the total amount paid is equal t ... , a9 M- X+ Z) ]0 L# _ q3 P
:lol::lol:# z6 D, q, M/ j0 T! E8 m9 s, d5 w
楼主的标题就是给你写的!) q6 D; _* d4 J5 d7 U) k
你看看我们智力超群的同学们回答的都多好啊! |
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