Final answer:
The question's details are insufficient to provide a definitive answer. Typically, in mathematics, solving for a variable such as 'x' or determining the value of an expression like 'LQ' requires a clear equation or context, which is missing from the provided snippets.
Step-by-step explanation:
Based on the snippet provided, it seems that the original question may contain elements that pertain to solving for variables within algebraic expressions or applying mathematical rules to decipher the value of a given expression. Nonetheless, the details are lacking and fragmented, creating ambiguity. Therefore, it's challenging to provide a factual response without having a clear understanding of the variables and equations involved. When a student seeks to determine the value of x or solve an expression like LQ, we would typically require the complete equation or context in which these variables are used.
In general, if we had an expression such as PQ where Q is known and P is to be determined, we would rearrange the equation to solve for P. As one of the provided snippets states the quantity equation of money MV = PQ, where M, V, and P are known, we can solve for Q by rearranging the equation to Q = MV / P. Especially in scenarios involving exponential expressions, as hinted by the fragment pertaining to the rule xPx9 = x(p+q), specific rules of exponents are applied to simplify or solve the expressions.