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x in (-oo:+oo)
p = (5*d)/11+15*v // - (5*d)/11+15*v
p-((5*d)/11)-(15*v) = 0
(-5/11)*d+p-15*v = 0
p-5/11*d-15*v = 0
x naleu017Cy do R
x in (-oo:+oo)
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