 鲜花( 634)  鸡蛋( 5)
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Originally posted by knptmug at 2005-4-20 09:47 PM:
4 m4 w2 ?6 g3 `6 B6 `, hset small watermelon: x, middle watermelon y and big watermeton z
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two simultaneous equations are set up:
+ }7 i( ] A! o6 Q; N0.5x+2y+5z=50 (1)3 _4 ~! Z4 D+ M- M% |, _
x+y+z=50 (2)
) `; t" H1 g$ k! LEquation(1) means that the total amount paid is equal t ... 3 a) c6 g0 k" x* |, J: @
:lol::lol:% P9 Q4 k7 s+ ?! d2 I
楼主的标题就是给你写的!
6 o4 E! @6 p- I, v, m) _/ v你看看我们智力超群的同学们回答的都多好啊! |
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