Question

1. two years of local internet service costs $685, including the installation fee of $85. what is the monthly fee? represent the problem. then solve the equation.

Explanation:

Step1: Define variables

Let $x$ = monthly fee (in dollars).

Step2: Set up total cost equation

Total cost = installation fee + (monthly fee × 24 months)
$$685 = 85 + 24x$$

Step3: Isolate the variable term

Subtract 85 from both sides:
$$685 - 85 = 24x$$
$$600 = 24x$$

Step4: Solve for $x$

Divide both sides by 24:
$$x = \frac{600}{24}$$

Answer:

The monthly fee is $\boldsymbol{25}$ dollars.