How do I write this as a equation?

Two years if local internet cost $685, including the installation fee if $85. What is the monthly fee?

600 / 24 = ?

Thank u Ms. Sue

To write this as an equation, we need to let "x" represent the monthly fee.

First, we can start by subtracting the one-time installation fee from the total cost of the two years to find the cost of the monthly fee over the two-year period.

Total cost of two years = $685
Installation fee = $85

Cost of monthly fee over two years = Total cost of two years - Installation fee

Since the total cost of two years is $685 and the installation fee is $85, we can write the equation as:

Cost of monthly fee over two years = $685 - $85

Next, we need to find the monthly fee. Since the cost of the monthly fee is spread over two years, we can divide the cost of the monthly fee over two years by 24 (the number of months in two years) to find the monthly fee.

Monthly fee = (Cost of monthly fee over two years) / Number of months (24)

Now, we can substitute the value of the cost of the monthly fee over two years into the equation and solve for x:

Monthly fee = ($685 - $85) / 24