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23#
發表於 2009-3-26 01:29 PM
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pure math
" K. U/ f6 C8 Q5 r' n2 Y, i公仔箱論壇
" A+ T5 O* D9 G4 K4 f公仔箱論壇[250(80x+1)+2y-250]/2 = (250*80x+2y)/2 = (2000x+2y)/2 = 1000x+y9 B& X4 c x: z: ^7 m4 q ?' Y
* y( q6 \. D. n$ b0 I" ?if x = 111 y = 2222, you number is 111-2222 |
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