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HP = {...,1,2,3,4,5}
Nomor 2.
x + 4 ≤ 9
x ≤ 5
HP = { 0, 1, 2, 3, 4, 5 }
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2).
8x + 9 > 3x - 15
5x > -24
x > -4,8
HP = { -4, -3, -2, -1, 0, ... }