أشتريت كتابا ومحفظة بما قدره 140درهما علما أن ثمن الكتاب يمثل 1/4ثمن المحفظة فما هو تهن الكتاب والمحفظة

The total cost of a book and a wallet is 140 dirhams. The price of the book is 1/4 of the price of the wallet. If we assume the price of the book is s and the price of the wallet is 4s, then s + 4s = 140. Solving this equation gives s = 28. Therefore, the price of the book is 28 dirhams and the price of the wallet is 4*28 = 112 dirhams.