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X in (-oo:+oo)
50 = (X+2)/1.15 // - (X+2)/1.15
50-((X+2)/1.15) = 0
50-0.86956522*(X+2) = 0
50-0.86956522*(X+2) = 0
48.26086956-0.86956522*X = 0
48.26086956-0.86956522*X = 0
48.26086956-0.86956522*X = 0 // - 48.26086956
-0.86956522*X = -48.26086956 // : -0.86956522
X = -48.26086956/(-0.86956522)
X = 55.49999983
X = 55.49999983
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