# How do Boyle's law and Charles law differ?

Boyle's law allows us to analyze changes in Pressure and Volume with other variables being held constant. Charles' law allows for analysis of Volume and Temperature with all other variables held constant.

Boyle's law can be written:
${P}_{1} {V}_{1}$ = ${P}_{2} {V}_{2}$

Here is a video example of how to solve a problem using this law.

Charles' law can be written:
${V}_{1}$/${T}_{1}$ = ${V}_{2}$/${T}_{2}$

Here is a video example of how to solve a problem using this law.