If the temperature is known on the Fahrenheit scale, then the formula is used to determine the temperature in degrees Celsius

If the temperature is known on the Fahrenheit scale, then the formula is used to determine the temperature in degrees Celsius:
a) Find the Celsius temperature if the Fahrenheit temperature is 50 °.
b) Derive a formula that can be used to find the temperature in Fahrenheit if you know the temperature in Celsius.

a) t = 5/9(50 —32) = 10°С
6) tF = 9/5t°C + 32

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