Geometry

Question Analysis:
This algebra-geometry hybrid question requires solving for variables using congruent triangle properties.

Key Concept Explanation:
Corresponding parts of congruent triangles are equal, allowing equation setup.

Step-by-Step Solution:
From ⊿ABC ≅ ⊿DEF:
AB ≅ DE ⇒ x + 5 = 15 ⇒ x = 10
BC ≅ EF ⇒ 2y - 3 = 7 ⇒ 2y = 10 ⇒ y = 5
Solution: x = 10, y = 5

Common Mistakes:
Solving equations incorrectly.
Mismatching corresponding sides.
Usin...