Find the value of the unknown exterior angle x in the following diagrams:

Explanation

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

### Step-by-Step Solution:

1. **Identify the Angles**: We are given the angles of triangle \( ABC \):
- Angle \( BAC = 50^\circ \)
- Angle \( CBA = 70^\circ \)
- We need to find the value of the exterior angle \( ACD = x \).
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