решите неравенство : l2х-4l < х+1
-(2х-4)<x+1 (2x-4)<x+1
-2x+4<x+1 2x-x<4+1
-2x-x<-4+1 x<5
-3x<-3
x<1
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-(2х-4)<x+1 (2x-4)<x+1
-2x+4<x+1 2x-x<4+1
-2x-x<-4+1 x<5
-3x<-3
x<1