Detailed Instructions: Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.
Q: Problem: if - 3 x + 5 y = 48 and 3 x - 2 y = 6, what is the product of x and y ?
Options: a. 252, b. 428, c. 464., d. 200, e. 642
A:
a