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23#
發表於 2009-3-26 01:29 PM
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pure math
5 K1 j+ h9 D' G1 `% C; t公仔箱論壇1 r/ X& T) e Z. k) ? K3 w
[250(80x+1)+2y-250]/2 = (250*80x+2y)/2 = (2000x+2y)/2 = 1000x+y公仔箱論壇2 t D# t6 k& d$ U) e N6 }! W% c
; d7 l+ k& w4 ^8 D: vif x = 111 y = 2222, you number is 111-2222 |
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