(x-7)*(x-1)/x^2+5x-6=-1 x^2-8x+7/x^2+6x-x-6=-1 x(x-7)-1(x-7)/x(x+6)-1(x+6)=-1 (x-1)(x-7)/(x-1)(x+6)=-1 x-7/x+6=-1 (x-7/x+6)+1=0 x-7+x+6/x+6=0; x<>-6 2x-1=0 x=0.5