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x in (-oo:+oo)
e^6*x = 5/2 // - 5/2
e^6*x-(5/2) = 0
e^6*x-5/2 = 0
e^6*x-5/2 = 0 // + 5/2
e^6*x = 5/2 // : e^6
x = 5/2/(e^6)
x = 5/2/(e^6)
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