It looks like you're asking to solve for an unknown, but I need more information to proceed.

Could you please provide the equation or expression you're working with? If it's an image, feel free to upload it, and I can analyze it for you.

Once I have the equation, I'll be able to help you solve for the unknown.

Here are some possible scenarios:

1. Linear equations (e.g., $2x + 5 = 15$)
2. Quadratic equations (e.g., $x^2 - 4x + 4 = 0$)
3. Systems of equations (e.g., $2x + y = 5$, $x - y = 1$)
4. Rational equations (e.g., $\frac{1}{x} + 2 = 5$)
5. Radical equations (e.g., $\sqrt{x + 3} = 7$)

Tip: Always ensure that your equation is simplified before solving for the unknown to avoid mistakes.