5x - 7 + 2x = 21 solve the linear and state the property that justifies your first step
1 answer:
Answer:
x = 4
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Equality Properties
Step-by-step explanation:
<u>Step 1: Define equation</u>
5x - 7 + 2x = 21
<u>Step 2: Solve for </u><em><u>x</u></em>
- Combine like terms: 7x - 7 = 21
- Add 7 on both sides: 7x = 28
- Divide 7 on both sides: x = 4
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