Hello, thank you for taking the time to post your question!
The key on this type of question is that you are trying to get the “x” variable by itself … so I would combine like terms to get
4x = 3x – 4
(4x – 3x) = -4
x = -4
I hope that helps get you moving in a better direction on this type of question! Feel free to reach out if you have any additional questions beyond that :)