 鲜花( 634)  鸡蛋( 5)
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Originally posted by knptmug at 2005-4-20 09:47 PM:
) e U$ d% w$ L" v. `set small watermelon: x, middle watermelon y and big watermeton z
$ H9 y% d9 F- U% M+ V+ W" ?
9 R$ b5 |% ~- |0 T W7 p' `, Stwo simultaneous equations are set up:( O7 F+ P1 R6 U, y
0.5x+2y+5z=50 (1)0 r, }: D, h3 O8 h4 e/ J# W. q7 G
x+y+z=50 (2)
- n8 e, w- i- w0 h* C3 c) I3 ]: tEquation(1) means that the total amount paid is equal t ... 0 L% D- b5 g9 k
:lol::lol:) r( d ^$ G1 o' i
楼主的标题就是给你写的!) N" ?4 |0 p* S+ z* S2 p8 o8 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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