I think it is negative five
For 6 points, answering 5 questions is a rip-off.
However, I shall answer 7.
haha sike get noob
The theoretical answer for the following question provided above would be found if you study
The equation is true because both sides are identical.
The final price of the item is $22,644
The initial discount of 10% leaves the price at 90% of the retail value:

cross multiply to solve for x:
100x = 3,060,000
x = 30,600
This new price is then discounted 26%, which means the final price is 74% of $30,600:

cross multiply to solve for x:
100x = 2,264,400
x = 22,644
The final price of the home entertainment system is $22,644