(x+1)/x-x/(x+1)=2/3通分得:[(x+1)^2-x^2]/[x*(x+1)]=3/2得2x+1/(x^2+x)=2/3得3x^2-x-2=0解得:x=-2/3或x=1
解:X+1/X - X/X+1 = 2/3 1+1/X-1+1/X+1=2/3 1/X+1/X+1=2/3 3X+3+3X=2X^2+2X (x+2/3)*(x-1)=0 x=-2/3 或x=1