Question

Даю 30 баллов пжжжжжжжжжжджжжжжжжжжжжжжжжж

Answer 1

$| |x| - 1 | = 4 \\ \\ |x | - 1 = 4 \\ |x | - 1 = - 4 \\ \\ x1 = - 5 \\ x2 = 5$

х = ∅