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x in (-oo:+oo)
4*y-8 = 12/q // - 12/q
4*y-(12/q)-8 = 0
4*y-12*q^-1-8 = 0
4*y-12*q^-1-8 = 0
x naleu017Cy do R
x in (-oo:+oo)
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