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r-y = r-(3*r)+(3*5)/6-4-2+2+3 // - r-(3*r)+(3*5)/6-4-2+2+3
r-r+3*r-y-((3*5)/6)-3-2+2+4 = 0
r-r+3*r-y-5/2-3-2+2+4 = 0
3*r-y-3/2 = 0
x naleu017Cy do R
x in (-oo:+oo)
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