Solve problems involving the calculation and conversion of units of measure 3 - Reasoning

Esin initially has a negative balance of £17.34 in her account, indicating an overdraft. To improve her balance, she adds £5 to her account. This transaction increases her balance, but it remains in the negative because the deposit is less than the overdraft amount. After this deposit, Esin's new balance is calculated by subtracting £5 from the negative balance, resulting in a balance of -£17.34 + £5.00, which equals -£12.34.

Next, Esin considers purchasing three books. To determine the total cost of the books, we multiply the price of one book by the quantity. If each book costs £4.20, then three books would cost 3 x £4.20, which equals £12.60. To find out what Esin's balance will be after buying the books, we subtract the total cost of the books from her current balance. So, starting with a balance of -£12.34 and spending £12.60 on books, Esin's balance would then be -£12.34 - £12.60, resulting in a new balance of -£24.94. This calculation indicates that Esin's overdraft will increase after the purchase of the books.