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x in (-oo:+oo)
x/y = 7.49 // - 7.49
x/y-7.49 = 0
x*y^-1-7.49 = 0 // + 7.49
x*y^-1 = 7.49 // : y^-1
x = 7.49/(y^-1)
x = 7.49/(y^-1)
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