there are 10 rows of 3 colums of "x"'s, so.. 3x10 or 30 "x"s, and we know that's 5/3 of the original... the original will be one whole or 3/3 or 1
thus [tex]\bf \begin{array}{ccllll}
size&x's\\
\textendash\textendash\textendash\textendash\textendash\textendash&\textendash\textendash\textendash\textendash\textendash\textendash\\
\frac{5}{3}&30\\\\
\frac{3}{3}&x
\end{array}\implies \cfrac{\frac{5}{3}}{\frac{3}{3}}=\cfrac{30}{x}
\implies
\cfrac{5}{3}=\cfrac{30}{x}[/tex]
solve for "x"
