Answer:
20
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Explanation:
Step 1: Define
n(5 + 2) - 15
n = 5
Step 2: Simplify
- (Parenthesis) Add: 7n - 15
Step 3: Evaluate
- Substitute in n: 7(5) - 15
- Multiply: 35 - 15
- Subtract: 20