a+b+c+d=200
! ]1 T& O K0 v! X4x-8-16-24=2005.39.217.775 z& t9 t; y; r) s7 {; N$ q
4x-8(1+2+3)=2005.39.217.77, E- l, ?$ ]: G4 u6 i
4x-8(6)= 200tvb now,tvbnow,bttvb) z* H; L- _" P; d/ X
4x=200+8(6)
" v1 E- r: @! g/ R ]# M! m/ lx=248/4& s r/ `+ Y; k$ V
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