Answer
center $(6,0)$, radius $r=4$
Work Step by Step
Rewrite the equation and form squares of $x,y$, we have $x^2-12x+36+y^2=36-20\longrightarrow (x-6)^2+(y)^2=16$. Thus, the equation represents a circle with center at $(6,0)$ and radius $r=4$