simplify the expression: 20 - 10y - 7y + 9

To simplify the expression \( 20 - 10y - 7y + 9 \), follow these steps:

1. Combine like terms (the constants and the terms with \(y\)):

   - Constants: \( 20 + 9 = 29 \)
   - \(y\)-terms: \(-10y - 7y = -17y\)

2. The simplified expression is:

\[
29 - 17y
\]

Would you like more details or have any questions?

Here are 5 related questions:
1. How do you simplify expressions with more variables?
2. Can you factor the expression \(29 - 17y\)?
3. How do you solve equations involving simplified expressions?
4. What happens if the expression includes exponents?
5. How do you simplify expressions with parentheses?

**Tip:** Always combine like terms first when simplifying any algebraic expression.

Learn how to simplify the algebraic expression 20 - 10y - 7y + 9 with a step-by-step approach. This guide covers key algebraic concepts such as combining like terms, making it suitable for students in Grades 6-8.

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