In countries like USA and Canada, temperature is measured in Fahrenheit, whereas in countries like India, it is measured in Celsius. Here is a linear equation that converts Fahrenheit to Celsius
3-Minute Hacks - How to convert Fahrenheit to Celsius | Facebook
Temperature Converter: Fahrenheit to Celsius & More
What is the reason -40 Fahrenheit the same as -40 Celsius? How does the conversion work to get the same number at -40? - Quora
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Why is -40 Degrees Fahrenheit the Same As Celsius?
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Fahrenheit to Celsius Formula: Celsius Formula Derivation ( f to c )