Question

5x - 7 + 2x = 21 solve the linear and state the property that justifies your first step

Answer 1

x = 4

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

Explanation:

Step 1: Define equation

5x - 7 + 2x = 21

Step 2: Solve for x

1. Combine like terms: 7x - 7 = 21
2. Add 7 on both sides: 7x = 28
3. Divide 7 on both sides: x = 4