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-6 > 3x + 4 > 6
- 10 > 3x > 2
- 10/3 > x > 2/3
.
2)
-2 < x - 3 < 2
1 < x < 5
3)
3 ≤ 3x - 2 ≤ 3
-1 ≤ 3x ≤ 5
-1/3 ≤ x ≤ 5/3
.
4.
- 9 ≥ 7x -12 ≥9
3 ≥ 7x ≥ 21
3/7 ≥ x ≥ 3
5.
- 5 > 3x + 2 >5
- 7 > 3x > 3
-7/3 x > 1