pure math公仔箱論壇( d' o' o9 d2 t$ i6 ?
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[250(80x+1)+2y-250]/2 = (250*80x+2y)/2 = (2000x+2y)/2 = 1000x+y0 H6 P1 }+ D" ]" J
, A; W* s+ O4 x, i- dif x = 111 y = 2222, you number is 111-2222作者: tingking55 時間: 2009-3-28 04:30 PM