[질문] 부등식2|x-1|+3|x+1|<6 의해

해: 1<=x<1, -7/5<x<-1 // x>=1; x<1 -> 근없음 / -1<=x<1; x<1 -> -1<=x<1 / x<-1; x>-7/5 -> -7/5<x<-1