Final answer:
To find the cost of the older truck, subtract 15% of $7200 from the original price.
Step-by-step explanation:
To find the cost of the older truck, we need to calculate 15% of $7200 and subtract it from the original price.
Step 1: Calculate 15% of $7200:
15% of $7200 = (15/100) * $7200 = $1080.
Step 2: Subtract $1080 from $7200 to find the cost of the older truck:
$7200 - $1080 = $6120.
Therefore, the older truck costs $6120.