Can You Solve This Simple Number Riddle Without Guessing?

This number riddle can be solved by working backward from the final result.

Let the unknown number be x:

2x + 12 = 30

First, subtract 12 from both sides:

2x = 18

Then divide both sides by 2:

x = 9

You can check the result:

9 × 2 = 18
18 + 12 = 30

Answer: 9

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