SAT Question 4a141e77: Lines, Angles, and Triangles answer and explanation with Desmos solution

Math - Lines, Angles, and Triangles - Parallel Lines And Transversal Angles
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72°72\text{°}
x°x\text{°}

Note: Figure not drawn to scale.

In the figure, line is parallel to line , and line intersects both lines. What is the value of ?

29
Difficulty:Easy