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x in (-oo:+oo)
x/y = 2.727272 // - 2.727272
x/y-2.727272 = 0
x*y^-1-2.727272 = 0 // + 2.727272
x*y^-1 = 2.727272 // : y^-1
x = 2.727272/(y^-1)
x = 2.727272/(y^-1)
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