Geometry

Question Analysis：
This question uses algebra to apply side properties.
The main focus is on solving for unknowns when opposite sides are equal.

Key Concept Explanation：
In parallelograms, opposite sides are congruent: KL = MN
This leads to a simple linear equation: 2x + 5 = 17

Step-by-Step Solution：
KL = 2x + 5, MN = 17
Set them equal: 2x + 5 = 17
Subtract 5: 2x = 12
Divide by 2: x = 6

Common M...