[tex] \bf \begin{array}{ccll}
\stackrel{blueberries}{lbs}&\stackrel{jam}{cup}\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
\frac{3}{4}&\frac{1}{2}\\\\
b&1
\end{array}\implies \cfrac{\quad \frac{3}{4}\quad }{b}=\cfrac{\quad\frac{1}{2} \quad }{1}\implies \cfrac{\quad \frac{3}{4}\quad }{\frac{b}{1}}=\cfrac{\quad\frac{1}{2} \quad }{\frac{1}{1}} [/tex]
[tex] \bf \cfrac{3}{4}\cdot \cfrac{1}{b}=\cfrac{1}{2}\cdot \cfrac{1}{1}\implies \cfrac{3}{4b}=\cfrac{1}{2}\implies 6=4b\implies \cfrac{6}{4}=b\implies \cfrac{3}{2}=b [/tex]
