2/(x2-x)+6/(1-x2)=7/(x2+x)2/x(x-1)-6/(x-1)(x+1)=7/x(x+1)[x*(x-1)*(x+1)]*[2/x(x-1)-6/(x-1)(x+1)]=[7/x(x+1)]*[x*(x-1)*(x+1)]2(x+1)-6x=7(x-1)-4x+2=7x-79=11xx=9/11