pure math5.39.217.774 a9 @3 H3 X2 q3 J" A
公仔箱論壇' R9 ?$ ~* g6 C$ L) u
[250(80x+1)+2y-250]/2 = (250*80x+2y)/2 = (2000x+2y)/2 = 1000x+y
# V8 j% _$ r* f/ b; r4 w# f- m% Ptvb now,tvbnow,bttvb
& r% ^4 S( G" [" b4 X" dtvb now,tvbnow,bttvbif x = 111 y = 2222, you number is 111-2222 |