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let 1st thing = X
: t2 u& q( E8 ~, t0 s5 l: _tvb now,tvbnow,bttvb     2nd thing=X+100
0 T9 b0 ^/ E2 O7 `8 N( o- ~公仔箱論壇
+ T( S% {0 A# e- J% s5 h; f公仔箱論壇X +( X+100) = 100.10
7 ]+ e. L. S' j1 C- h- ^- A2X + 100 = 100.10
* C3 f% U1 }8 t/ {, Ktvb now,tvbnow,bttvb2X = 100.10 - 100 = 0.10tvb now,tvbnow,bttvb+ P4 P3 A4 e. {7 w
X = 0.10 / 2 = 0.05
! c! {9 v3 a3 g- ~+ e6 j7 p. stvb now,tvbnow,bttvb公仔箱論壇2 U# A& d4 f& K4 z8 j5 s  E2 Z
1st thing = X = 0.05
. v, ^0 I% b0 @: u7 V! P2nd thing = X+100 = 100.05