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The expression provided is \( y - 2a \), and we are given that \( a = -4 \) and \( y = 3 \).

Let's substitute these values into the expression:

\[
y - 2a = 3 - 2(-4)
\]

Now, solve the equation:

\[
3 - 2(-4) = 3 + 8 = 11
\]

So, the value of the expression is **11**.

Would you like more details or have any questions?

Here are 5 related questions for further practice:
1. What is the value of \( y - 3a \) when \( a = -4 \) and \( y = 3 \)?
2. If \( a = 2 \) and \( y = 7 \), what is the value of \( y - 2a \)?
3. How would the result change if \( a = 0 \) in the expression \( y - 2a \)?
4. Evaluate \( y + 2a \) when \( a = -4 \) and \( y = 3 \).
5. What happens to the expression \( y - 2a \) when \( a \) is a positive number?

**Tip**: Always double-check the signs when working with negative numbers in expressions!

Evaluate the expression when a = -4 and y = 3 for y - 2a.

Learn how to evaluate the algebraic expression y - 2a by substituting values for a and y. In this example, a = -4 and y = 3, demonstrating the concept of substitution and working with negative numbers in expressions. Suitable for Grades 6-8.

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