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x in (-oo:+oo)
3*m+(4*n)/5 = (5*m)/2 // - (5*m)/2
3*m-((5*m)/2)+(4*n)/5 = 0
3*m+(-5/2)*m+(4*n)/5 = 0
1/2*m+4/5*n = 0
x naleu017Cy do R
x in (-oo:+oo)
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