To simplify the expression \(3x \times a \times 5b\), follow these steps:

1. **Multiply the coefficients (numbers):**
   \[
   3 \times 5 = 15
   \]

2. **Combine the variables:**
   \[
   x \times a \times b = xab
   \]

So, the simplified expression is:
\[
15xab
\]

Would you like more details on any of these steps, or do you have any other questions?

Here are some related questions you might find interesting:
1. How do you simplify expressions involving more variables, like \(3x \times a \times 2y \times b\)?
2. What happens when variables have exponents, such as \(3x^2 \times a \times 5b\)?
3. How do you simplify expressions with negative coefficients?
4. What is the associative property of multiplication, and how does it apply here?
5. How do you simplify expressions that involve division as well as multiplication?
6. What is the commutative property, and why does it allow you to rearrange terms?
7. How do you handle expressions that include parentheses, like \(3x(a \times 5b)\)?
8. What steps would you take to factor an expression like \(15xab\)?

**Tip:** When multiplying expressions with multiple variables, keep the variables in alphabetical order for clarity.

Learn how to simplify the expression 3x * a * 5b using basic algebraic rules. This problem involves multiplying coefficients and combining variables. Suitable for students in Grades 6-8.

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