Answer:
a = 20
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Equality Properties
Explanation:
Step 1: Define
8a - 15 - 6a + 3a = 85
Step 2: Solve for a
- Combine like terms: 5a - 15 = 85
- Isolate a term: 5a = 100
- Isolate a: a = 20