1{2x-3y=1/3⇒6x-9y=3{3x-7y=5/(-2)⇒-6x+14y=-10прибавим5y=-7y=-7:5y=-1,42x+4,2=12x=-3,2x=-3,2:2x=-1,6(-1,6;-1,4)2{5-3x≤-4⇒3x≥9⇒x≥3{(x-3)/4+(x-4)/3>(x-5)/2+(x-1)/8⇒6x-18+8x-32-12x+60-3x+3>0⇒x<13{|x-3|>2 ⇒ x-3<-2 U x-3>2⇒x<1 U x>5х∈(5;13)Ответ х=63x≠-1x³-3x²+x+x²-3x+1-3x²-x+2=0x³-5x²-3x+3=0x²(x+1)-6x(x+1)+3(x+1)=0(x+1)(x²-6x+3)=0x+1=0x=-1 не удов услx²-6x+3=0D=36-12=24x1=(6-2√6)/2=3-√6x2=3+√6