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