Question

Amy received a $80 gift card for a coffee store. She used it in buying some coffee that cost $8.24 per pound. After buying the coffee, she had $38.80 left on her card. How many pounds of coffee did she buy?

Answer 1

5 pounds

Explanation:

Given that:

Amount of gift card = $80

Cost of coffee per pound = $8.24

Amount left in the card = $38.80

To find:

Number of pounds of coffee bought = ?

Solution:

Let the number of pounds of the coffee bought =
`x` pounds

Cost of 1 pound = $8.24

Cost of
`x` pounds = $8.24
`* x`

Writing the equation as per question statement:

`80 - 8.24x = 38.80\\\Rightarrow 80 - 38.80 = 8.24x\\\Rightarrow 8.24x = 41.2\\\Rightarrow x = (41.2)/(8.24)\\\Rightarrow \bold{x = 5\ pounds}`

Therefore, 5 pounds of coffee was bought.