Thầy cô làm ơn giúp con với dc ko ạ. Con thề sẽ đánh giá 5 sao và cảm ơn nhiệt tình huhu giúp con với. Giải bài toán bằng cách lập phương trình: Tháng 2 năm 2016 thu tiền quỹ được 3596000 đồng.Biết rằng mỗi ngày, mỗi bạn nữ đóng 2000 đồng và mỗi bạn nam đóng 3000 đồng. Số học sinh nữ là 20 người. Tính số học sinh cả lớp 9A

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