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X in (-oo:+oo)
X-(2/3) = 4*(2/5) // - 4*(2/5)
X-(2/3)-(4*(2/5)) = 0
X-2/3-8/5 = 0
X-34/15 = 0 // + 34/15
X = 34/15
X = 34/15
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