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23#
發表於 2009-3-26 01:29 PM
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公仔箱論壇4 P) R U3 \9 {! m; i2 k) M
[250(80x+1)+2y-250]/2 = (250*80x+2y)/2 = (2000x+2y)/2 = 1000x+y* d9 ~$ l4 i( ]3 k; z, w! y1 D
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if x = 111 y = 2222, you number is 111-2222 |
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