Final answer:
Without additional information or context linking the values of m A and m D, it's impossible to determine the specific value of m A. The question seems to lack the necessary details to solve for x.
Step-by-step explanation:
The question requires solving for the value of m A given that m A equals 4x and m D equals 5x + 27. Without additional context, such as a relationship between m A and m D, or further equations to form a system, we cannot determine a specific value for x, and thus can't solve for m A. It seems that there might be missing information, such as m A and m D being angles in a figure where their relationship is known, or other equations that would allow us to solve for x. However, using the information provided, it's not possible to determine the value of m A.