Answer:you save $32.09
Explanation:
You want to buy a 159-pound treadmill. The online price of the treadmill is $110 less than the price of the same treadmill at a local fitness store, but you have to pay shipping.
If you decide to buy at the online price, the slowest shipping is 3 - 5 days at $0.49/lb. This means that the cost of shipping the 159 pound treadmill would be
159 × 0.49 = $77.91
If x represent the price of the thread mill at the local fitness store, then the online price would be x - 110
Since the shipping cost is $77.91, then the total cost of the treadmill when you buy online would be
x - 110 + 77.91 = x - 32.09
The amount saved by buying the treadmill online with the slowest shipping instead of buying it in the local store would be
$32.09