3/(x-1)-x+3/(x²-1)=0两边同时乘以x²-13(x+1)+3=0x=-2带入检验合格2/x-3=1/2x十字相乘4x=x-3x=-12x+1/x-3-2/3-x=1(2x+1)/(x-3)+2/(x-3)=1同时乘以x-32x+1+2=x-3x=-6