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chinhhy
2 năm trước
hiện nay tổng số tuổi của 2 anh em là 15 tuổi . biết rằng khi tuổi của em bằng tuổi của anh hiện nay thì tuổi của anh gấp 1,5 tuổi của em khi đó . tính tuổi 2 người hiện nay
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