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X in (-oo:+oo)
(3*X)/2+1 = 12.2 // - 12.2
(3*X)/2-12.2+1 = 0
3/2*X-11.2 = 0 // + 11.2
3/2*X = 11.2 // : 3/2
X = 11.2/3/2
X = 7.46666667
X = 7.46666667
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