Please help from this simple exponential equation problem!

I'm basically done all the questions that I needed to do, yet this one I can't seem to find how to answer for some reason.

3(2)^x = 4^(x + 1)

To find x, I try to put it to logarithmic function,

3*(x)(Log 2) = (x + 1)(Log 4)

My question is, is that where the 3 goes? It multiplies (x)(Log 2)? Doing it this way I end up with,

0.9x - 0.6x = 0.6

**x = 2**

The correct answer however is **-0.42**

I really need help what to do with that 3, as I've read the book plenty now and I still don't know how this works! Please help!

There's also another question similar to this, and of course I can't answer it either.

5(4)^2x = 4(2)^6x

Any help is greatly appreciated!