Question

What is the value of k?

2k+9=7−3k


k=−2

k=−0.4

k = 2

k = 3.2

Answer 1

k = -0.4

General Formulas and Concepts:

Pre-Algebra

Equality Properties

1. Multiplication Property of Equality
2. Division Property of Equality
3. Addition Property of Equality
4. Subtraction Property of Equality

Algebra I

• Terms/Coefficients

Explanation:

Step 1: Define

Identify

2k + 9 = 7 - 3k

Step 2: Solve for k

1. [Addition Property of Equality] Add 3k on both sides: 5k + 9 = 7
2. [Subtraction Property of Equality] Subtract 9 on both sides: 5k = -2
3. [Division Property of Equality] Divide 5 on both sides: k = -0.4