Solve the numerical reasoning problems involving box patterns, specifically problems 11-14 using the formula X/L = A + R.

Here are the solutions to the numerical reasoning problems.

Box Problems (11, 12, 13, 14):
The pattern for the box problems is that the number in the box ($X$) divided by the left branch number ($L$) equals the sum of the arrow number ($A$) and the right branch number ($R$).
The formula is: $\frac{X}{L} = A + R$

:
Given: $X = 48$, $L = 3$, $A = 4$, $R = ?$