Question

Owen has twice as many marbles as his friend Ric. If Owen has 21 marbles, how many marbles does Ric have?​

Answer 1

Ric has 42 marbles.

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

Explanation:

Step 1: Define

Owen = x marbles

Ric = 2x marbles

x = 21 marbles

Step 2: Find

1. Substitute in x: 2(21 marbles)
2. Multiply: 42 marbles