 鲜花( 634)  鸡蛋( 5)
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Originally posted by knptmug at 2005-4-20 09:47 PM:
* a: K2 P3 T, E* s2 Qset small watermelon: x, middle watermelon y and big watermeton z4 z0 a) O' k4 m5 x
* p9 K' R A. t ? s' t. W6 \, {) Btwo simultaneous equations are set up:" v+ f4 f2 r" w% L% v3 P" ~% f7 {
0.5x+2y+5z=50 (1)0 y2 R, {) T8 E. Y) _# b9 ]" x0 _
x+y+z=50 (2)
1 M' d, }5 F& |( IEquation(1) means that the total amount paid is equal t ...
0 d$ F) w1 K. h7 W1 J( |:lol::lol:
0 M- m# b) Y1 M1 N+ B楼主的标题就是给你写的!
4 _; w& t. P' Z! f你看看我们智力超群的同学们回答的都多好啊! |
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