Carmen received a gift card for a coffee store. She used it in buying some coffee that cost $8.12 per pound. After buying the coffee, she had $31.28 left on her card. How many pounds of coffee did she buy?

Question

Carmen received a  gift card for a coffee store. She used it in buying some coffee that cost $8.12 per pound. After buying the coffee, she had $31.28 left on her card. How many pounds of coffee did she buy?

anonymous · Answer

I think you are missing some information, like how many pounds did she buy or how much was originally on the card.

anonymous · Answer

let p for pound
$8.12 p=$31.28 
           p=$31.28 /$8.12

anonymous · Answer

$80 gift card

anonymous · Answer

the question is How many pounds 
is : 3.85 pounds

anonymous · Answer

$80-$8.12 p=$31.28 
                  p=$31.28 -80
                  p= -48.7/-8.12
                  p = 6 pounds