Answer:
x + y
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Algebra I
Explanation:
Step 1: Define
x + (x - y) + y + (y - x)
Step 2: Simplify
- Combine like terms (x): x - y + y + y
- Combine like terms (y): x + y