Question 357899
Use the common denominator, {{{r^2-16=(r+4)(r-4)}}}
{{{(2r)/(r^2-16)+r/(r-4)=(2r)/(r^2-16)+(r(r+4))/((r-4)(r+4))}}}
{{{(2r)/(r^2-16)+r/(r-4)=(2r+r(r+4))/((r-4)(r+4))}}}
{{{(2r)/(r^2-16)+r/(r-4)=(2r+r^2+4r)/((r-4)(r+4))}}}
{{{(2r)/(r^2-16)+r/(r-4)=(r^2+6r)/((r-4)(r+4))}}}
{{{(2r)/(r^2-16)+r/(r-4)=highlight((r(r+6))/((r-4)(r+4)))}}}