Math Problem Statement

The steps to correctly solve an equation are shown. Move a property into each box of the Reason column to justify each step.

Solution

Let's solve this step-by-step and match the appropriate property with each equation transformation:

  1. Step 1: 4(x+7)=9x74(x + 7) = 9x - 7

    • Reason: This is the original equation (already provided).
  2. Step 2: 4x+28=9x74x + 28 = 9x - 7

    • Reason: This transformation uses the distributive property (distributing 44 to both xx and 77).
  3. Step 3: 28=5x728 = 5x - 7

    • Reason: Here, the 4x4x is subtracted from both sides, leaving 28=5x728 = 5x - 7. This applies the subtraction property of equality.
  4. Step 4: 35=5x35 = 5x

    • Reason: Adding 77 to both sides eliminates the 7-7, using the addition property of equality.
  5. Step 5: 7=x7 = x

    • Reason: Dividing both sides by 55 gives xx, which uses the division property of equality.

Thus, the table would look like this:

StepEquationReason
14(x+7)=9x74(x + 7) = 9x - 7original equation
24x+28=9x74x + 28 = 9x - 7distributive property
328=5x728 = 5x - 7subtraction property of equality
435=5x35 = 5xaddition property of equality
57=x7 = xdivision property of equality

Would you like further details or have any questions about this process?

Here are some related questions for you to explore:

  1. What is the associative property and when would you use it in solving equations?
  2. How does the commutative property differ from the distributive property?
  3. Why is it important to understand properties of equality in solving equations?
  4. Can you provide an example where the multiplication property of equality is used?
  5. What is the reflexive property of equality and how might it apply to algebra?

Tip: The distributive property allows you to multiply a number by a group of terms inside parentheses, a key step in simplifying algebraic expressions.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Properties of Equality

Formulas

Distributive Property
Addition/Subtraction/Division Properties of Equality

Theorems

Properties of Equality

Suitable Grade Level

Grades 8-10