Решите двойное неравенство
- 1 < 5x + 4 < 9

2 < 6 - 2x < 4

- 1 ≤ (x - 6)/5 ≤ 1

- 5 ≤ (x - 4)/3 ≤ 1

- 3 < 2x - 1 < 3
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