Answer:
$4
Step-by-step explanation:
Discount is a form of consideration in price or amount given to a customer on a sale of goods. It can be deduced from the question that;
The original price of each plant = $x
Number of plants purchased = 20
Price of the number of plants purchased without discount = $20x
Amount paid for the 20 plants with discount = $(20x - 80)
Thus,
The discount on the 20 plants = $80
Discount on each plant = ![\frac{total discount on plants}{number of plants purchased}](https://tex.z-dn.net/?f=%5Cfrac%7Btotal%20discount%20on%20plants%7D%7Bnumber%20of%20plants%20purchased%7D)
= ![\frac{80}{20}](https://tex.z-dn.net/?f=%5Cfrac%7B80%7D%7B20%7D)
= $4
Discount on each plant = $4
Therefore, each plant was discounted by $4.