Answer:
20/3
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS 
- Brackets 
- Parenthesis 
- Exponents 
- Multiplication 
- Division 
- Addition 
- Subtraction 
Explanation:
Step 1: Define
a + b/3
a = 4, b = 8, c = 2, d = 7, e = 3, f = 9, g = 10
Step 2: Evaluate
- Substitute in a and b: 4 + 8/3
- Add: 20/3