SOLUTION
From the equation
48 divided
[tex]\begin{gathered} \frac{48}{b}=12 \\ \\ \frac{48}{b}=\frac{12}{1} \\ \\ \text{Cross multiplying } \\ 12b=48 \\ \text{dividing both sides by 12,} \\ \frac{12b}{12}=\frac{48}{12} \\ \\ b=\text{ 4} \end{gathered}[/tex]
So, b = 4 makes the equation to be true
