Linear Equation: Calculate Hours of AC Usage at $1 per Hour = $180

To solve this problem, we'll follow these steps:

• Step 1: Set up the equation based on the given information.
• Step 2: Solve the equation to find the number of hours.

Now, let's work through each step:
Step 1: We know that Sarah pays 1 for every hour the air conditioner is on. Therefore, the equation representing the total cost is:
\( 180 = 1 \times h

Step 2: Solve this equation for $h$. Since $1 \times h = h$, the equation simplifies to:
$h = 180$

Therefore, the solution to the problem is $h = 180$.