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3x < 9
x < 3
syarat log 3x-1 > 0
3x > 1
x > 1/3
jadi hp = {1/3 < x < 3}
3x -1 < 2³
3x -1 < 8
3x < 8 + 1 (pindah ruas jadi +)
3x < 9
x < 3
syarat 3x-1 > 0
3x > 1
x > 1/3
grafik
++++ ----------- ++++
3 arsir kirii < ebih kecil
++++ ---------- +++
1/3 arsir kanan lebih besar