Answer: -(3 x + 5)
Simplify the following: 
6 x - 9 x - 3 - 2 
 
Grouping like terms, 6 x - 9 x - 3 - 2 = (6 x - 9 x) + (-3 - 2): 
(6 x - 9 x) + (-3 - 2) 
 
6 x - 9 x = -3 x: 
-3 x + (-3 - 2) 
 
-3 - 2 = -5: 
-5 - 3 x 
 
Factor -1 out of -3 x - 5: 
Answer: -(3 x + 5)