Answer:

Explanation:
Let the total purchase be given as 'p' dollars.
Given:
Price of a notebook = $5
Price of a pen = $1.50
Number of pens purchased = 'x'
Number of notebooks purchased = 1
So, cost of 'x' pens can be obtained using unitary method and is given as the product of price per pen and number of pens.
So, price of 'x' pens = Price per pen
Number of pens
Price of 'x' pens =

Now, total purchase price will be equal to the sum of the price of a notebook and price of 'x' pens.
Therefore, the total purchase price is given as:
Total price = 1 notebook price + 'x' pens price
⇒
