Toán Lớp 6: b) 3/4-5/6 bé hơn hoặc bằng x/12<1-(2/3-1/4)

3/4 - 5/6 ≤ x/12 < 1 - (2/3 - 1/4) → -1/12 ≤ x/12 < 1 - 5/12 → -1/12 ≤ x/12 < 7/12 → -1 ≤ x < 7 ⇒ x ∈ {-1; 0; 1; 2; 3; 4; 5; 6}

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Toán Lớp 6: b) 3/4-5/6 bé hơn hoặc bằng x/12

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