[tex]\bf \begin{array}{ccllll}
copies&minutes\\
\textendash\textendash\textendash\textendash\textendash\textendash&\textendash\textendash\textendash\textendash\textendash\textendash\\
36&1\\
189&x
\end{array}\implies \cfrac{36}{189}=\cfrac{1}{x}[/tex]
solve for "x"
