Final answer:
Without a specific equation, we cannot solve for x. However, the context provided includes descriptions of linear and quadratic equations, suggesting a math problem likely from high school level mathematics.
Step-by-step explanation:
To solve for x, we require a specific equation or problem set, which seems to be missing from the provided details. However, if we refer to the information provided, several equations related to linear equations and quadratic equations are mentioned. For instance, the quadratic equation ax² + bx + c = 0 can be solved using the quadratic formula, which is x = (-b ± √(b² - 4ac)) / (2a). But without the specific equation that needs solving, we cannot proceed to find the value of x. We could approach the problem by analyzing each provided option and associating it with the relevant context it belongs to; however, without more details, this would only be speculative.