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a) ½-2x<-½
-2x<-½-½
-2x<-1 /:(-2)
x>1/2
b) -2<2x-1
-1<2x /:2
x>-1/2
c) -½x+1>2
-½x>2-1
-½x>1 /;(-1/2)
x<-2
d) -2x+1>2
-2x>2-1
-2x>1 /:(-2)
x<-1/2
1/2-2x<-1/2
-2x<-1/2-1/2
-2x<-1//:(-2)
x>1/2
b)
-2<2x-1
-2x<-1+2
-2x<1//:(-2)
x>-1/2
c)
-1/2x+1>2
-1/2x>2-1
-1/2x>1//:(-1/2)
x<-1/2
d)
-2x+1>2
-2x>2-1
-2x>1//:(-2)
x<-1/2