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23#
發表於 2009-3-26 01:29 PM
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pure math5.39.217.778 c& K! l1 T( ~% h
( [+ j' D8 k8 A* m7 f/ |5.39.217.77[250(80x+1)+2y-250]/2 = (250*80x+2y)/2 = (2000x+2y)/2 = 1000x+y
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1 d+ _! ^- g$ V公仔箱論壇if x = 111 y = 2222, you number is 111-2222 |
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