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23#
發表於 2009-3-26 01:29 PM
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pure math
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- ?: v7 T0 k) h# E公仔箱論壇[250(80x+1)+2y-250]/2 = (250*80x+2y)/2 = (2000x+2y)/2 = 1000x+y6 K- a+ [/ t- c0 E
% J+ f3 s& E( x6 H: q/ O# P公仔箱論壇if x = 111 y = 2222, you number is 111-2222 |
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