Answer:
[tex]\boxed{2a+3-b}[/tex]
Step-by-step explanation:
Distributive property:
↓
A(B+C)=AB+AC
Remove parenthesis first.
7-(a-b)-4+3a-2b
(-a-b)=-a+b
7-a+b-4+3a-2b
Simplify, to find the answer.
7-a+b-4+3a-2b
Group like terms:
↓
-a+3a+b-2b+7-4
Add numbers from left to right.
-a+3a=2a
2a+b-2b+7-4
b-2b=-b
2a-b+7-4
Adding and subtracting numbers from left to right.
7-4=3
2a+3-b
[tex]2a+3-b[/tex], which is our answer.
