pure math公仔箱論壇( d) V+ z1 Q3 S1 B! j/ ~
tvb now,tvbnow,bttvb1 Q: y/ g3 }! j4 s( ]$ Y; B6 P! s
[250(80x+1)+2y-250]/2 = (250*80x+2y)/2 = (2000x+2y)/2 = 1000x+y
! `) i: P6 s+ Z公仔箱論壇tvb now,tvbnow,bttvb* @; h4 U, k" C
if x = 111 y = 2222, you number is 111-2222 |