## Americans measure the temperature in ^{o}F.

Europeans measure the temperature in ^{o}C.

The formula to convert Fahrenheit to Celsius is:

c = 5 (f - 32) / 9

where / is the symbol for division,

f represents the temperature in ^{o}F and

c represents the temperature in ^{o}C.

What is the temperature at which the Celsius and Fahrenheit readings are the same?

60^{o}80^{o} -40^{o} -20^{o}