Geometry

Question Analysis：
This question requires understanding angle relationships in a parallelogram and solving for a variable.
The main focus is on adjacent angles being supplementary.

Key Concept Explanation：
In a parallelogram:
Adjacent angles are supplementary
So, angle L + angle M = 180°

Step-by-Step Solution：
Set up the equation: (2x + 10) + (3x – 5) = 180
Combine like terms: 5x + 5 = 180
Subtract 5: 5x = 175
Divide by 5: x = 35

Common Mistakes：
Using wrong ang...