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| 5x - 2 | = 2
5x - 2 = 2
5x = 2 + 2
5x = 4
x = 4/5
5x - 2 = -2
5x = 2 - 2
5x = 0
x = 0/5
x = 0
HP = { 0 atau 4/5 }
2)
| 1 - 2x | < 4
-4 < 1 - 2x < 4
-4 > 2x - 1 > 4
(-4 + 1)/2 > x > (4+1)/2
-3/2 > x > 5/2
3)
| 2x + 1 | ≥ 8
-8 ≥ 2x + 1 ≥ 8
(-8 - 1)/2 ≥ x ≥ ( 8-1)/2
-9/2 ≥ x ≥ 7/2