Given the equation:

\[
y(x - 8)
\]

Substitute \( x = 12 \) and \( y = 5 \) into the equation:

\[
5(12 - 8)
\]

First, simplify inside the parentheses:

\[
5(4) = 20
\]

So, the result is \( 20 \).

Would you like more details or have any questions?

Here are 5 related questions:
1. What happens if \( x \) is negative in this equation?
2. How does the result change if \( y \) is a fraction?
3. Can you solve the equation for \( x \) if the result is given?
4. What is the geometric meaning of this equation?
5. How would this change if \( x \) or \( y \) were complex numbers?

**Tip:** Always perform operations inside parentheses first when simplifying an expression.

Learn how to solve the algebraic expression y(x - 8) by substituting x = 12 and y = 5. This step-by-step solution simplifies the expression, showcasing basic substitution and simplification techniques. Suitable for students in Grades 6-8, this example provides a foundation in algebraic operations.

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