Question

Solve for k:
0.8k - 20 = -60

Answer 1

k = - 50

Explanation:

0.8 k - 20 = - 60

Add 20 to each side

0.8 k - 20 + 20 = - 60 + 20

0.8 k = - 40

divide each side by 0.8

0.8 k / 0.8 = -40 / 0.8

k = - 50

Answer 2

k = -50

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

1. Brackets
2. Parenthesis
3. Exponents
4. Multiplication
5. Division
6. Addition
7. Subtraction

• Left to Right

Equality Properties

• Multiplication Property of Equality
• Division Property of Equality
• Addition Property of Equality
• Subtraction Property of Equality

Explanation:

Step 1: Define

Identify

0.8k - 20 = -60

Step 2: Solve for k

1. [Addition Property of Equality] Add 20 on both sides: 0.8k = -40
2. [Division Property of Equality] Divide 0.8 on both sides: k = -50