We can divide both sides by negative four. We get e to the negative four x is equal to negative three-fourths divided by negative four is three-fourths. We can take the natural log of both sides and we will get negative four x is equal to the natural log of three-fourths. And just to be clear what I did here, you literally could put the natural log here, natural log there, and you could put the natural log there as well to see that step. This is saying what power do I have to raise e to to get e to the negative four x? Well, obviously I just need to raise e to the negative four x over there. So this power is negative four x.