what is the critical value(s) of the equation $${\frac{\left(\left({\mathtt{5}}{\mathtt{\,\times\,}}{\mathtt{x}}{\mathtt{\,-\,}}{\mathtt{5}}\right){\mathtt{\,\times\,}}\left({\mathtt{x}}{\mathtt{\,\small\textbf+\,}}{\mathtt{3}}\right)\right)}{\left({\mathtt{3}}{\mathtt{\,\times\,}}{\mathtt{x}}\right)}} = {\mathtt{0}}$$
