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x - 2x < 1 + 2
-x < 3
x < -3
(x - 2)² < (2x + 1)²
(x - 2)² - (2x + 1)² < 0
(x - 2 - (2x + 1))(x - 2 + 2x + 1) < 0
(- x - 3)(3x - 1) < 0
- 3 < x < 1/3