The General Gas Law is a combination of

Boyle's Law,

Amonton’s Law and

Charles' Law. It reads as follows:

P1 x V1 P2 x V2
_______ = ________
T1 T2

Here, T1 is the temperature at the first location, T2 is the temperature at the second. Temperature was originally measured in Rankine units, which is the temperature in Fahrenheit plus 460 (Absolute zero in Fahrenheit is -460 degrees), but now the more standard Kelvin units are used.