Final answer:
Without the actual system of equations, it's impossible to determine if the ordered pair (5, -6) is a solution to the system; we need to substitute the pair into each equation to confirm.
Step-by-step explanation:
To determine whether the ordered pair (5, −6) is a solution to a given system of equations, we must test it in each equation of the system. A solution to the system must satisfy all the individual equations simultaneously. However, you haven't provided the actual equations, so without this critical information, it's impossible to determine which of the statements A, B, C, or D is true.
Generally, if substituting 'x' with 5 and 'y' with −6 in an equation yields a true statement, then (5, −6) is a solution to that equation. If it satisfies both equations in the system, then it is a solution to the system. If it does not satisfy at least one of them, then it is not a solution to the system.