Answer:

Step-by-step explanation:
As per the statement:
Quinton bought x number of shares for p dollars and paid a 1% commission
⇒He brought = 
It is also given that he sold the stock for y dollars and paid a flat fee of $7.
⇒He sold = 
then;
Net proceed is given as:

Therefore, quintons net proceeds algebraically is 
The answer is 24. If you cross multiply witht he eight over top of the twenty-four, and the x (unknown length of shadow) over seventy-two and cross multiply (8 times 72, x times 24) then get 576 = 24x and divide twenty four on both sides, then that should give you the correct answer.
The answer is four
See my handwritten problem worked out in attached pic