If $\frac{x}{2}-5=9$, what is the value of $\sqrt{7 x}$ ?
Rearranging the given equation, we get $\frac{x}{2}=14$ which implies that $x=28=2^{2} \times 7$.

Therefore, $\sqrt{7 x}=\sqrt{7 \times 2^{2} \times 7}=\sqrt{2^{2} \times 7^{2}}=2 \times 7=14$.

ANSWER: 14