The image contains the expression:

$4x - b + 2a - 3b$

I will simplify this expression by combining like terms.

Given the expression:

$4x - b + 2a - 3b$

• Combine the terms involving $b$: $-b - 3b = -4b$
• The terms involving $x$ and $a$ remain as they are, since there are no other like terms for them.

So, the simplified expression is:

$4x + 2a - 4b$

Would you like further details on this? Here are some related questions:

1. How do you identify like terms in an algebraic expression?
2. What are the rules for combining like terms?
3. Can we apply this technique to more complex expressions?
4. How do variables affect the simplification of expressions?
5. How do coefficients influence the outcome when combining terms?

Tip: Always group similar terms together in an expression before performing operations like addition or subtraction for easier simplification.