Let $a, b, c$ and $d$ be positive real numbers; the value of the first notation equals the number $\frac{a+d}{b+c}$, and the value of the second notation equals the number $\frac{a \cdot d}{b \cdot c}$.
Given that the above holds, what is x?
A) 12
B) 16
C) 24
D) 36
E) 48