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⇔ -3 > x-7 > 3
⇔ -3+7 > x > 3+7
⇔ 4 > x > 10
2. |x+4| < 2
⇔ -2 < x+4 < 2
⇔ -2-4 < x < 2-4
⇔ -6 < x < -2