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x in (-oo:+oo)
(1/2)*x = 27.3 // - 27.3
(1/2)*x-27.3 = 0
1/2*x-27.3 = 0 // + 27.3
1/2*x = 27.3 // : 1/2
x = 27.3/1/2
x = 54.6
x = 54.6
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