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PHP: Find the missing digit x from the given expression

Hello everyone,

I hope you are all doing well. I have recently encountered a problem while working on a PHP program, and I was hoping someone here could help me out.

I am trying to find the missing digit x from a given expression. Unfortunately, I am not able to figure out how to solve this problem. Can someone please assist me with this?

Here is the expression: <?php echo "2x + 12 = 30"; ?>

As you can see, there is a missing digit represented by x in the equation. I need to find the correct value of x that satisfies the equation. I have tried various approaches, but none of them seem to work.

If anyone has any idea or suggestions on how to solve this problem, I would greatly appreciate your help. Thank you in advance for your assistance!

Best regards,
[Your Name]

All Replies


Hi [Your Name]!

I had a similar situation not long ago, and I can offer some guidance on solving your problem. To find the value of x in the given equation, you can follow these steps:

1. Start by subtracting 12 from both sides of the equation: 2x + 12 - 12 = 30 - 12. This simplifies to 2x = 18.

2. Next, divide both sides of the equation by 2: 2x/2 = 18/2. This gives us x = 9.

So, the missing digit in the expression 2x + 12 = 30 is 9. By substituting x with 9 in the equation, it should hold true.

I hope this helps you solve your problem! If you have any further questions, feel free to ask.

Best regards,
User 1


Hey there [Your Name],

I see you have a missing digit problem to tackle in PHP, and I'd be happy to lend a hand! Solving equations with missing variables is always a fun challenge. Here's how I approach it:

Let's work with the equation 2x + 12 = 30. To find the value of x, we need to isolate it on one side of the equation. Here's what you can do:

Starting with 2x + 12 = 30, subtract 12 from both sides: 2x = 30 - 12. This simplifies to 2x = 18.

Here's where it gets exciting. To get rid of the coefficient 2, you could divide both sides of the equation by 2. This yields x = 18 / 2.

The answer is x = 9! By substituting x with 9 in the equation, you can see that it holds true.

If you have any further queries or need assistance with anything else, feel free to ask. Happy coding!

Warm regards,
User 2

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