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1. |x-1|-3 ≥ 4 -> |x-1| ≥ 7 -> 1.I. x-1≥7 -> x≥8
->1.II x-1≤ -7 -> x≤-6
2.|x-1|-3 ≤ -4 -> |x-1| ≤ -1 -> niemożliwe
zatem:
x∈(-∞,-6] U [8, +∞)