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Verified answer
Bab Nilai MutlakMatematika SMA Kelas X
|x - 4| - 1 < 8
|x - 4| < 8 + 1
|x - 4| < 9
-9 < x - 4 < 9
-9 + 4 < x - 4 + 4 < 9 + 4
-5 < x < 13
HP = { x | -5 < x < 13, x € bilangan real }