###### Exercise69

To convert a temperature measured in degrees Fahrenheit to degrees Celsius, there is a formula:

\(\displaystyle{ C={\frac{5}{9}\!\left(F-32\right)} }\)

where \(C\) represents the temperature in degrees Celsius and \(F\) represents the temperature in degrees Fahrenheit.

If a temperature is \(23 {^\circ}\text{F}\text{,}\) what is that temperature measured in Celsius?