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x in (-oo:+oo)
(x^1)/2-3 = 8 // - 8
(x^1)/2-8-3 = 0
x/2-8-3 = 0
1/2*x-11 = 0 // + 11
1/2*x = 11 // : 1/2
x = 11/1/2
x = 22
x = 22
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