Let's simplify the expression \( 7a - 9b + 6a - 4b \).

1. Combine the like terms:
   - Combine the terms with \( a \): \( 7a + 6a = 13a \)
   - Combine the terms with \( b \): \( -9b - 4b = -13b \)

Thus, the simplified expression is:
\[
13a - 13b
\]

Would you like more details or have any questions about this?

Here are 5 related questions:
1. How do you combine like terms in an expression?
2. What are like terms, and how can you identify them?
3. How would you simplify \( 5x - 3y + 7x - 8y \)?
4. How would you factor \( 13a - 13b \)?
5. Can you simplify expressions with more variables, like \( 5x - 3y + z + 7x - 8y + 2z \)?

**Tip**: Always group and combine like terms to simplify expressions effectively.

Learn how to simplify the algebraic expression 7a - 9b + 6a - 4b by combining like terms. This step-by-step solution demonstrates the process of grouping and simplifying variables. Suitable for students in Grades 6-8.

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