The temperature dropped by 12° in 5 hours. The temperature dropped the same amount every hour. Complete the equation that represents the amount of change, X, of temperatures every hour and solve this equation.

5x = ?
The temperature decreased by ? every hour.

The equation that represents the amount of change, X, of temperatures every hour is 5x = -12.

To find the value of X, we need to solve this equation:
Dividing both sides of the equation by 5, we get: x = -12/5 = -2.4.
Therefore, the temperature decreased by 2.4° every hour.