1 lớp có 36 học sinh chia làm 3 tổ để dựng trại . lúc đầu số bạn ở 3 tổ khác nhau .co giao chuyen 1/3 so ban o to 1 sang to 2 , sau do chuyen 1/5 số bạn hiện có ở tổ 2 sang tổ 3 . cuối cùng chuyện 1/7 số bạn hiện có ở tổ 3 về tổ 1 thì số bạn ở 3 tổ bằng nhau . hỏi lúc đầu tổ 1 hơn tổ 3 bao nhiêu học sinh ?
toán lớp mấy vậy bn, cái này ko phải dạng tổng tỉ r,khó quá
câu này í hả
cậu làm như thế này
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đó như thế
cái này à
chia sang dạng tổng ty hoặc là giả thiết hoặc mở kết quả ra và tính
