Question

Sara had 136 dollars to spend on 8 books. After buying them she had 16 dollars. How much did each book cost ?

Answer 1

Sara spent $15 on each book

Explanation:
Sara had $16 left, so
136-16=120

this means she spent $120 on books
She bought 8 books, so
120/8= 15

therefore, 1 book costs $15

Answer 2

Each book cost 15 dollars.

Here’s the work: Sara had 136 dollars and spent some money on 8 books. After buying them she had 16 dollars left. So she spent 136 - 16 = 120 dollars on books. Since she bought 8 books with that money, each book cost her 120 / 8 = 15 dollars.