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The problem involves identifying the missing reason for a step in the solution of an equation. The equation starts with \( 2(x + 3) = 10 \), and various steps are given, each with a corresponding reason, except one.

The missing reason is related to the step where the equation goes from \( 2(x + 3) = 10 \) to \( 2x + 6 = 10 \). This step involves applying the **Distributive Property of Multiplication over Addition**.

So, the correct answer is **D**. The missing reason is the **Distributive property of multiplication over addition**.

Would you like a detailed explanation of the steps? Here are 5 related questions:

1. What is the Distributive Property, and how is it used in solving equations?
2. Can you provide more examples of equations that require the Distributive Property?
3. What is the difference between the Associative and Commutative properties of addition?
4. How does the Subtraction Property of Equality work in equation solving?
5. What other properties are commonly used in solving linear equations?

**Tip:** When solving equations, carefully identify each step and the corresponding property to avoid missing justifications.

A student solved the given equation and justified every step except one. What is the missing reason?

Discover how to solve the linear equation 2(x + 3) = 10 and identify the missing reason in the solution steps. Learn key algebraic concepts such as the Distributive Property and Properties of Equality. Suitable for Grades 7-9.

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