The value of $X$ is 61°.

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Here are some related questions:

1. How do you determine the value of angles in triangles using supplementary angles?
2. What is the sum of angles in a triangle?
3. Can this problem be solved using alternate interior angles?
4. How does the exterior angle theorem help in solving this problem?
5. What other geometric principles apply to this situation?

Tip: Remember, the sum of angles in any triangle always equals 180°.