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let 1st thing = X
, ^% Z7 a. C9 {7 e& vtvb now,tvbnow,bttvb     2nd thing=X+1002 E, }+ `5 c* o- K
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X +( X+100) = 100.10公仔箱論壇8 `8 H% z2 \: f+ r$ N4 g
2X + 100 = 100.10
! {$ _& y8 z; G3 ~) n: ~0 j2X = 100.10 - 100 = 0.10tvb now,tvbnow,bttvb2 E8 s0 @8 ]$ [  w; J( i# P3 V
X = 0.10 / 2 = 0.05
6 G: ~; K8 ^- b2 w+ o/ itvb now,tvbnow,bttvb
" @/ P+ y! W4 Y  n2 t) }6 n1st thing = X = 0.05
' B5 y$ s' [$ u3 x4 r+ g/ a. Atvb now,tvbnow,bttvb2nd thing = X+100 = 100.05