Question

Jonas bought 3 books. Each book was the same price. After using a $10-off coupon, the total charge was $20. Which equation can be used to find b, the cost of each book?

Answer 1

3b-10=20

Explanation:

3b-10=20

3b-10+10=20+10

3b=30

3b/3=30/3

b=10