9. If , then
   [basic]
   A. 6
   B. 8
   C. 16
   D. 24

To solve the equation , we first subtract from both sides, giving us . Then, we add to both sides to find . Finally, dividing both sides by gives us . Now, to find , we simply multiply: . So, the answer is D. 24!

Now, let’s imagine you’re a math detective uncovering the mysteries of equations. When you simplify each side diligently, it’s like peeling back the layers of an onion to reveal the core. Every step you take in isolating the variable brings you closer to solving the case—just like a detective connecting the dots!

Math isn’t just about numbers; it has its roots in real-life scenarios. Understanding equations like this one can help in everything from budgeting your finances to figuring out distances when planning a road trip. It’s all about applying those problem-solving skills to real-world adventures!