 鲜花( 634)  鸡蛋( 5)
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Originally posted by knptmug at 2005-4-20 09:47 PM:( i& N1 \3 W7 r, G! `
set small watermelon: x, middle watermelon y and big watermeton z* D5 x0 ~* C. u8 y2 A. @3 c
3 H: `- m1 ~7 L' m. ?% htwo simultaneous equations are set up:
7 t( _6 y {+ D* w( m0.5x+2y+5z=50 (1)
/ j( z( V% |* U2 R' kx+y+z=50 (2)
i+ s+ m; S1 g3 R, z k' b, gEquation(1) means that the total amount paid is equal t ... 7 F2 Z& g; J! q, ~# `% \ Y: y0 o S5 [1 t
:lol::lol:
$ L( v; h% d8 ]" |7 F& ~& Q楼主的标题就是给你写的!
/ d# r7 X, w" i3 n, B; ^你看看我们智力超群的同学们回答的都多好啊! |
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