I have to find x in this problem

logbase2(2^4x) = 20

The 2 is raised to the power 4x.

I started off by doing (2^4x)/ln2 = 20

then got 2^4x = 20ln2 and got stuck too.

Thanks.. I am trying to get ready for my quiz tommorow in calc 2.

Thanks for all the help.