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Verified answer
1. -5x + 2 < 6 - 4x-5x + 4x < 6 - 2
-x < 4
x > -4
HP : {x| x > -4, x ∈ R}
2. 3x - 1 < 2x + 2 < 5 - x
(i)
3x - 1 < 2x + 2
3x - 2x < 2 + 1
x < 3
(ii)
2x + 2 < 5 - x
2x + x < 5 - 2
3x < 3
x < 1
irisan dari (i) dan (ii) adalah x < 1
HP : {x| x < 1, x ∈ R}