 鲜花( 634)  鸡蛋( 5)
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Originally posted by knptmug at 2005-4-20 09:47 PM:. K4 l& m* f: o, c+ Q
set small watermelon: x, middle watermelon y and big watermeton z. }7 F3 F7 {0 A' U) |
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two simultaneous equations are set up:" \* C; S$ |+ ^8 {, B8 J
0.5x+2y+5z=50 (1)
- d# D( b- B& L3 k, jx+y+z=50 (2)% p, Y% _* b0 j5 S# v
Equation(1) means that the total amount paid is equal t ...
& e9 c5 v7 K) i& K* S3 |& m% i:lol::lol:
( n6 g2 i6 S/ I" o& D楼主的标题就是给你写的!6 t1 g: w6 e# 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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