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X in (-oo:+oo)
X = 150*(1/3.5) // - 150*(1/3.5)
X-(150*(1/3.5)) = 0
X-42.85714286 = 0
X-42.85714286 = 0 // + 42.85714286
X = 42.85714286
X = 42.85714286
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