Geometry

Question Analysis:
This question applies the property of equal opposite sides in rectangles.
Focus is on solving an equation using side equality.

Key Concept Explanation:
In rectangles, opposite sides are congruent:
2x + 1 = 5x − 11

Step-by-Step Solution:
2x + 1 = 5x − 11
1 + 11 = 5x − 2x
12 = 3x → x = 4

Common Mistakes:
Switching sides incorrectly when isolati...