Answer:
5x + 7
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS 
- Brackets 
- Parenthesis 
- Exponents 
- Multiplication 
- Division 
- Addition 
- Subtraction 
Distributive Property
Algebra I
Explanation:
Step 1: Define
3(x + 5) + 2(x - 4)
Step 2: Simplify
- Distribute: 3x + 15 + 2x - 8
- Combine like terms (x): 5x + 15 - 8
- Combine like terms (Z): 5x + 7