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x in (-oo:+oo)
(x^1)/2 = 30.889 // - 30.889
(x^1)/2-30.889 = 0
x/2-30.889 = 0
1/2*x-30.889 = 0 // + 30.889
1/2*x = 30.889 // : 1/2
x = 30.889/1/2
x = 61.778
x = 61.778
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