The Quick-Mart grocery store sells 5 bottles of water for $2.00. How many bottles of water can a customer buy with $12.00?
What we know
5 bottles of water → $2.00
customer spends $12.00
How to solve
If we know that 5 bottles of water costs $2.00, we can find out how many bottles of water the customer bought if he spent $12.00
$2.00 → 5 bottles of water
$4.00 → 10 bottles of water
$6.00 → 15 bottles of water
$8.00 → 20 bottles of water
$10.00 → 25 bottles of water
$12.00 ⇒ 30 bottles of water
Therefore, the customer can buy 30 bottles of water for $12.00.