Geometry

Question Analysis:
This is an algebra problem that uses a property of parallelograms.
The main focus is applying equality of opposite sides.

Key Concept Explanation:
In parallelograms:
Opposite sides are equal in length
So, AB = CD

Step-by-Step Solution:
Set the expressions equal: 2x + 3 = 5x − 6
Solve for x:
2x + 3 = 5x − 6
3 + 6 = 5x − 2x
9 = 3x
x = 3

Common Mistakes:
Forgetting to subtract proper...