Answer:
x+4
Explanation:
What I like to do in these types of problems is to separate the terms with a variable and those without.
So move +4 to the very end of the problem to make it look like this:
6x-3x-2x+4
Now simply subtract! After subtracting the first two terms (6x and -3x) it should look like this:
3x-2x+4
Then subtract once more (3x-2x)!
x+4
This cannot be simplified anymore so x+4 should be your final answer!