Question

A cookie factory puts 3/5 of a barrel of flour into each batch of cookies. How much flour will the factory use for 9 batches?

Answer 1

`\bf \begin{array}{ccllll} \textit{barrel of flour}&\textit{cookies batch}\\ \textendash\textendash\textendash\textendash\textendash\textendash\textendash\textendash\textendash&\textendash\textendash\textendash\textendash\textendash\textendash\textendash\textendash\textendash\\ (3)/(5)&1\\ x&9 \end{array}\implies \cfrac{(3)/(5)}{x}=\cfrac{1}{9}`

solve for "x"