Answer:
s = -17
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Equality Properties
- Multiplication Property of Equality
- Division Property of Equality
- Addition Property of Equality
- Subtraction Property of Equality
Algebra I
Explanation:
Step 1: Define
Identify
-8s + 4 = -7s + 21
Step 2: Solve for s
- [Addition Property of Equality] Add 7s on both sides: -s + 4 = 21
- [Subtraction Property of Equality] Subtract 4 on both sides: -s = 17
- [Division Property of Equality] Divide -1 on both sides: s = -17