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2018
2 năm trước
tính b) | -5 | . (-7) + 4 . (-9) em đang cần gấp Bài 2. (3 điểm) Tìm x ∈ Z, biết: a) x + 5 = -2 + 11 b) -3x = -5 + 29 c) | x | - 9 = -2 + 17 d) | x – 9 | = -2 + 17
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