-2 < 1 - 5x + 1 < 16 himpunan penyelesaian

-2<1-5x+1<16
-2<2-5x<16
-4<-5x<14
4/5 < x < -14/5

Hp{x| 4/5 < x < -14/5 , x€R}

-2 < 1 -5x+1 < 16
-2 < 2-5x <16
-4 < -5x < 14
4/5 < x < 14/5