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x in (-oo:+oo)
a+3/b-4 = 3/4 // - 3/4
a+3/b-(3/4)-4 = 0
a+3/b-3/4-4 = 0
a+3*b^-1-19/4 = 0
x naleu017Cy do R
x in (-oo:+oo)
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