To simplify the expression \((13x - 20) + (7x)\), follow these steps:

1. Combine the like terms involving \(x\):
   \[
   13x + 7x = 20x
   \]
   
2. The constant term \(-20\) remains unchanged.

Thus, the simplified expression is:
\[
20x - 20
\]

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

Here are five related questions:
1. How would you solve for \(x\) if the expression \(20x - 20 = 0\)?
2. What happens if you add another constant to the expression \(20x - 20\)?
3. How would the solution change if the expression was \((13x + 20) + (7x)\)?
4. How would you factor the expression \(20x - 20\)?
5. What is the value of \(x\) when \(20x - 20 = 40\)?

**Tip:** Always group like terms (such as variables) together before simplifying an algebraic expression.

Learn how to simplify the algebraic expression (13x - 20) + (7x) by combining like terms. This solution involves key algebraic concepts and is ideal for students in Grades 6-8. The step-by-step process helps students understand simplification in algebra.

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