Two years of local internet service costs 685, including the installation fee of 85. What is the mon

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Two years of local internet service costs 685, including the installation fee of 85. What is the monthly fee?

Subtract the installation fee of 85 from the total cost of 685 to get the service cost only:

685 - 85 = 600

Now, divide that by 24 months in 2 years to get a per month fee
600/24 = 25 per month