14-12-2020
Mathematics

contestada

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

Respuesta :

14-12-2020

Answer:

x = 4

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Step-by-step explanation:

Step 1: Define equation

5x - 7 + 2x = 21

Step 2: Solve for x

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

Answer Link

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