Maria's Leisure Time Allocation: Optimizing Tennis and Karaoke

Let x be the number of tennis matches played and y be the number of karaoke sessions attended.

'Money constraint:' 7(3x) + 4(2y) ≤ B, where B is the monthly budget for leisure activities. 6(3x) + 6(2y) ≤ B

'Time constraint:' 3x ≤ 24 (assuming there are 8 hours available for leisure activities each day) 2y ≤ 24