Which of these skills are used in game design? drawing OR artistic visualization OR project management OR all of the above

All of the above. Because if you think about it game designing it’s like the editing part of the movie you have to draw in the special Effects, visualize what they look like, and you have to have good project management so you can get it done on time

3x+9+4x+x=8x+9that's the answer for your question.

Here, feel free to ask if there are any questions