College Math Placement Practice Test 2025 – Comprehensive All-in-One Guide for Exam Success!

Question: 1 / 400

What is the value of x in the equation 4x + 12 = 28?

x = 2

x = 3

x = 4

To determine the value of $ x $ in the equation $ 4x + 12 = 28 $, the goal is to isolate $ x $. Here’s how you can solve this step-by-step:

1. Start with the original equation:

4x + 12 = 28

2. The first step is to eliminate the constant on the left side, which is $ 12 $. To do this, subtract $ 12 $ from both sides of the equation:

4x + 12 - 12 = 28 - 12

This simplifies to:

4x = 16

3. Now, to isolate $ x $, divide both sides of the equation by $ 4 $:

\frac{4x}{4} = \frac{16}{4}

This results in:

x = 4

Thus, the value of $ x $ that satisfies the equation is $ 4 $. This is why the correct answer is the one indicating that \( x = 4

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