A comfortable room temperature is 20°C. What is this temperature in
degrees Fahrenheit?

Using the conversion:(F - 32) / 9  = C/5                        F = Fahrenheit                                                      C = Celsius(F - 32) / 9 = 20/5F-32  = 9*(20/5)F - 32 = 9*4F - 32 = 36F = 36 + 32F = 68So it is 68 degrees Fahrenheit.