Find the value of the unknown interior angle x in the following figures:

Explanation

To find the value of the unknown interior angle \( x \) in the given triangle, we will follow these steps:

### Step-by-Step Solution:

1. **Identify the Given Angles**:
- Angle \( BAC = 50^\circ \)
- Angle \( CBA = x \) (unknown)
- External angle \( ACD = 115^\circ \)
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