Lớp 9A, 9B cùng nhau đóng góp sách làm thư viện nhỏ tặng mái ấm. Biết năm lần số lượng sách đóng góp của lớp 9A nhiều hơn bốn lần lượng sách đóng góp của lớp 9B là 5 quyển. Lớp 9A đóng góp số sách ít hơn lớp 9B là 19 quyển. Hỏi tổng số sách đóng góp của 2 lớp là bao nhiêu? *

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