Answer:
It will take the bakery 2.875 hours to make back the amount invested.
The total expenses and receipts, both will = $112.125
Step-by-step explanation:
Given:
Cost of equipment = $69
Operation cost per hour = $15
Average hourly receipts = $39
To find how many hours will it take for the Bakery to make back the amount invested and what would the total expenses and receipts both equal
Solution:
Let the bakery take
hours to make back the amount invested.
Operation cost for
hours in dollars will be = 
Equipment cost = $69
Total expenses in dollars can be given as = 
Receipts for
hours in dollars will be = 
<em>Since the bakery makes up the amount invested in </em>
<em> hours, so the amount in expenses must be equal to the total receipts for </em>
<em> hours.</em>
Thus, we have:

Subtracting both sides by 


Dividing both sides by 24.

∴ 
So, in 2.875 hours the bakery will be able to make back all the investment.
Total expenses in 2.875 hours will be = 
Total receipts will be the same and can be given as = 