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thiynhi040696
2 năm trước
Bài 2: Tìm số nguyên x biết: 1) x – 2 = -6 2) 15 – (x – 7) = -21 3) |x – 2| = 3 4) 72 – 3.|x + 1| = 9 5) (x – 2).(x + 4) = 0 Bài 3: Tính: 1) (-13) + (-15) + (-8) 2) –(-127) + (-117) – 303 – 7 3) (-4).(-5).(-6) 4) (-3 – 5) . (-3 + 5) 5) (-7)3.23
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