$22.50
You can get this by dividing the new total by 116%, which is how much of the bill was paid.
Answer:
Solving the equation
for variable n we get 
Step-by-step explanation:
We need to solve the equation
for variable n
Solving:

Subtract both sides by 6p

Switch sides of equality

Divide both sides by 3

So, solving the equation
for variable n we get 
The missing side length should be 22. Add 13.5 to 14.5 and you should get 28. Subtract 28 from the total perimeter (50) to get 22.
The answer for this equation is 540!
Y= 3/5x - 15/5
This should be your answer