Question

At which temp Celsius equal to Fahrenheit

Answer 1

-40°C = -40°F
You may check it with formula
C/5 = (F-32)/9

Answer 2

-40
To find the temperature when both areequal, we use an old algebra trick and just set ºF = ºC and solve one of the equations. So the temperature when both the Celsius and Fahrenheit scales are the same is -40 degrees