碑个铁一样的答案你:
: y% h3 ]3 m6 w; c+ ?# wwww3.tvboxnow.com假设你本身有12蚊.公仔箱論壇1 Y# Z6 z% k5 z2 H
8蚊买,仲有4蚊系袋.& ^6 h- g# \1 R
9蚊卖。又有返13蚊7 e9 I2 R9 m0 h+ }9 Z
10蚊买,剩低3蚊,
. l* u: d) ?' N% z5 ?2 Fwww3.tvboxnow.com11卖,又有返14蚊系袋,
0 K* u6 t6 y7 H% S' d* Q7 a14-12=2.! E8 x; B) y# k y( ]3 P+ i
铁一般的证明!!!!!!!!!!
1 U |6 T: A7 `5 ztvb now,tvbnow,bttvb实在太多人答岩咗,楼主唔敢讲答案》?????? |