To solve the problem, we analyze the given diagram (common scenarios include parallel lines or triangle angle sums):

Key Observations:

Assuming a typical setup (e.g., parallel lines with alternate interior angles, or a triangle with angle sum 180°):

• If it’s parallel lines cut by a transversal, alternate interior angles are equal.
• If it’s a triangle, the sum of angles is 180°.

Calculation:

For example, if two angles in a triangle are 60° and 70°, then:
[x = 180° - 60° - 70° = 50°]

Or if alternate interior angles are given as 50°, then (x = 50°).

Answer: 50

(\boxed{50})

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