1. Let's clarify the context: in step 5, the left side of the equation was rewritten from a fraction to another form. 2. Typically, rewriting a fraction involves expressing it as a product or simplifying it by factoring numerator and denominator. 3. For example, if the fraction is \frac{a}{b}, and both numerator and denominator share a common factor c, you can rewrite it as \frac{c \cdot d}{c \cdot e} = \frac{d}{e}. 4. Alternatively, if the fraction is complex, you might multiply numerator and denominator by the same expression to simplify or rationalize it. 5. The key is that rewriting a fraction is valid if you apply algebraic rules such as factoring, multiplying by 1 (in the form of \frac{x}{x}), or simplifying common factors. 6. This process helps to make the equation easier to solve or to isolate variables. 7. If you provide the exact fraction from step 5, I can show precisely how it was rewritten and why it is valid.