当x>=5丨x-5丨-丨2x+3丨<1x-5-2x-3<1-x-9<0x>-9有x>=5当-3/2<=x<5丨x-5丨-丨2x+3丨<15-x-2x-3<1x>1/3有1/3当x<-3/2丨x-5丨-丨2x+3丨<15-x+2x+3<1有x<-7综上得:x<-7或x>1/3