Question

A number is multiplied by 8, and that product is added to 4. The sum is equal to the the product of 4 and 13. Find that number

Answer 1

n = 6

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 + set up

8n + 4 = 4 · 13

Step 2: Solve for x

1. Multiply: 8n + 4 = 52
2. [Subtraction Property of Equality] Subtract 4 on both sides: 8n = 48
3. [Division Property of Equality] Divide 8 on both sides: n = 6