Would it be possible to replace the letter X with a natural number that makes the sentence below true?

5 . **X** = 1

Replacing **X**we have:

**X** by 0, we have: 5.0 = 0**X** for 1, we have: 5.1 = 5

Therefore, replacing **X **by any natural number, we will never find product 1. To solve this problem, we have to create new numbers. Thus arise the **fractional numbers**.

* Every equivalent fraction represents the same fractional number.*

So a fraction (n nonzero) and all fractions equivalent to it represent the same fractional number .

Now solving the initial problem, we conclude that **X** = , because .