Answer:
12x - 3y
Explanation:
All you have to do for this question is combine like terms. It isn't wanting you to solve for anything, so it's pretty fast to do. Since the 2 and 10 both have x values next to them, you can combine them. They are both positive, so you can simply add them together. This gives you 12x. Because the -3 and 12 have different values next to them, you cannot combine them. So you are left with 12x - 3y. This is your answer.
I hope this makes sense and is easy to understand. Please let me know if you need any more help. Have a great day and good luck!!