himpuanan pertidaksamaan dari -6<3(x-1)<9

-6 < 3(x-1) < 9
-2 < x-1 < 3
-1 < x < 4

Hp ={-1< x < 4}

-6 < 3(x - 1) < 9
= -6 < 3x - 3 < 9 (semuanya + 3)
= -6 + 3 < 3x - 3 + 3 < 9 + 3
= -3 < 3x < 12 (semuanya /3)
= -3/3 < 3x/3 < 12/3
= -1 < x < 4

HP = {x | -1 < x < 4}

maaf kalau salah
semoga membantu