Answer:
The answer to your questions is below
Step-by-step explanation:
Number of copies of the book that the store has at the end of the day on Wednesday = N
Number of copies on Monday = M = 30
books sold on Monday = m = 6
books sold in Tuesday = t = 3
Books received on Wednesday = W = 24
Books sold on wednesday = w = 8
N = M - m - t + W - w
N = 30 - 6 - 3 + 24 - 8
N = 37 books have the bookstore now.