So let's rewrite these guys in terms of our mathematical formula for kinetic energy, namely one two, MV squared. The one subscript simply represents gas molecule one, and the two subscript simply represents gas molecule two. So blue is one, red is two. So one two m one, V one squared is equal to one two M two V two squared. So let's cancel out the twos by multiplying each side by two. And then let's bring our V two over and our m one over this way.