You have $16 and a coupon for a $5 discount at a local supermarket. A bottle of olive oil costs $7. How many bottles of olive oil can you buy?
$7 - $5 =$2 Cost of 1 bottle of olive oil.
$16 - $2 =$14 You are left with this much after you buy the first bottle for $2.
$14 / $7 = 2 More bottles of olive oil that you can buy with your $16. So:
1 + 2 = 3 bottles of olive oil you can buy with $16 and a $5 discount.
Alright thanks
OR just 16+5=21
21/7 = 3 bottles
+92 
