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Verified answer
1.l3x +5l ≥ 4
3x + 5 ≥ 4
3x ≥ 4 - 5
x ≥ -1/3
3x + 5 ≤ -4
3x ≤ -4 -5
3x ≤ -9
x ≤ -3
HP = {x|x≤ -3 atau x≥-1/3}
2.
l7 - 3xl < 1
7 - 3x < 1
-3x < 1 - 7
-3x < -6
x > 2
7 - 3x > -1
-3x > -1-7
-3x > -8
x < 8/3
HP = {x|x < 8/3 atau x>2}