Mary received an $80 gift card for a coffee store. She used it in buying some coffee that cost $8.21 per pound. After buying the coffee she had $30.74 left on her card. How many pounds of coffee did she buy?

Respuesta :

CORRECT ANSWER: 6 pounds of coffee

EXPLANATION:
80 - 8.21x= 30.74
-30.74
49.26 =8.21x
49.26/8.21

X= 6