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x in (-oo:+oo)
((x-4)^1)/4 = 3 // - 3
((x-4)^1)/4-3 = 0
(x-4)/4-3 = 0
(x-4)/4+(-3*4)/4 = 0
x-3*4-4 = 0
x-16 = 0
(x-16)/4 = 0
(x-16)/4 = 0 // * 4
x-16 = 0
x-16 = 0 // + 16
x = 16
x = 16
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