Answer:
[tex]\boxed{2n+2}[/tex]
Step-by-step explanation:
You remove parenthesis.
-n-3+3n+5
Group like terms
↓
-n+3n-3+5
Add numbers from left to right.
-n+3n=2n
2n-3+5
Adding and subtracting numbers from left to right.
-3+5=2
2n+2 is the correct answer.
