1. Quinn spent $16.49 for 3 magazines and 4 sheets of stickers. The magazines cost $3.99 each and the sales tax was $1.02. Quinn also used a coupon for $1.50 off her purchase. If each sheet of stickers had the same cost, how much did each sheet of stickers cost?

2. Jairo spent $40.18 on 3 music cds. Each cd cost the same amount. The sales tax was $2.33. Jairo also used a coupon for $1.00 off his purchase. How much did each cd cost?

I have tried solving the above problems several different ways and cannot figure out how. Can you please help me.

6 answers

1.
cost of sticker ---- x
3(3.99) + 4x + 1.02 - 1.50 = 16.49
11.97 + 4x - .48 = 16.49
4x = 16.49 - 11.97 + .48
4x = 5.00
x = 1.25

#2 is just as easy, just follow my steps
let the cost of each CD be x
Can you just take $40.18/3 to find out the cost of each cd?
No, you can't Patrick, because there was also sales tax and a coupon. You therefore must subtract the sales tax and add the coupon value, then divide that number by three.
Quinn
You must subtract the sales tax and add the coupon value, then divide that number by three.
You'd actually subtract the sales tax AND the coupon. Then divide by 3

Hope this was helpful.