59.302 miles from Lakeview to Sun Valley
The new length side of the perimeter, we'll call p. The original length, we'll call o. P's equation looks like this:

Since 5 is the length of one side, subtract 2 from 5 to get 3. The equation looks like this:

or simply
The difference between two numbers is 19. Half the larger number plus twice the smaller number is 12. What are the numbers?
This is the equation I came up with but I can't make it work.
x-y=19
1/2x+2y=12
Since there’s a power to a power you can multiply the powers together. It can be simplified to 54^16.
If she works 40 hours or less then she earns 20x dollars.
If she works more than 40 hours, then she earns 20×40 dollars for the first 40 hours and 30×(x-40) dollars for <span>every hour over 40 hours. The number of hours over 40 hours is x-40.</span>