|| x |+4|=5
|...| - модуль
||...|| - модуль в модуле
||x|+4| = 5
|x + 4| =5
x + 4 = 5
x = 5 - 4
x = 1
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||x|+4| = 5
|x + 4| =5
x + 4 = 5
x = 5 - 4
x = 1