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x in (-oo:+oo)
3*a+4*b = 1-((2*c)/d) // - 1-((2*c)/d)
3*a+4*b+(2*c)/d-1 = 0
3*a+4*b+2*c*d^-1-1 = 0
x naleu017Cy do R
x in (-oo:+oo)
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