Jika 3<2x-7 <5 ,  maka

3<2x-7 <5   

3<2x-7                        
-2x<-7-3
-2x<-10
x>-10 : -2
x > 5

2x-7<5
2x<5+7
2x<12
x < 12 : 2
x < 6

{ 5 < x < 6 }