To solve for the missing number in the equation \( \frac{70}{x} = 5 \), you can multiply both sides by \( x \) to eliminate the denominator:
\[ 70 = 5x \]
Next, divide both sides by 5 to solve for \( x \):
\[ x = \frac{70}{5} = 14 \]
So, the missing number is 14.