It looks like you're trying to solve for \( x \) in the equation \( 38 \text{ units} + 9 \text{ units} = x \).
To solve for \( x \):
- Add the two numbers together: \[ 38 \text{ units} + 9 \text{ units} = 47 \text{ units} \]
So, \( x = 47 \text{ units} \).
If you are also referring to a right triangle in relation to those measurements, please provide more context, such as what each unit represents (e.g., sides of the triangle), and I can assist you further!