Question

Sara had 324 dollars to spend on 9 books. After buying them she had 18 dollars. How much did each book cost? What is the equation?

Answer 1

34 because of inverse operations u subtract 18 from 324 and get 308 and divide that by 9 so it equals 34

Answer 2

Each book costed $34.

Explanation:

Let the cost of a book be x.

`324-9x=18`

Add 9x to both sides:

`324=18+9x`

Subtract 18 from both sides:

`306=9x`

`9x=306`

Divide both sides by 9:

`x=34`

Each book costed $34.