Question

Jane received a 90$ gift card for a coffee store.she used it in buying some coffee that cost $7.82 per pound.After buying the coffee,she had $43.08 left on her card.How many pounds of coffee did she buy

Answer 1

So, let's build up a simple equation to solve that!

I have $90 total. After x pounds of coffee that costs $7.82 each, I'm left with $43.08. So,

90 - 7.82x = 43.08 (Let's subtract 90 in both sides)

-7.82x = 43.08 - 90

-7.82x = - 46.92 (Multiply by -1)

7.82x = 46.92 (divide by 7.82 on both sides)

x = 6 pounds

She bought 6 pounds of coffee.