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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 7: TÌm x,y,z : | 5-3x | +2 /3 = 1/6

Toán Lớp 7: TÌm x,y,z : | 5-3x | +2 /3 = 1/6

Comments ( 2 )

  1. Answer
    |5 – 3x| + 2/3 = 1/6
    => |5 – 3x| = 1/6 – 2/3
    => |5 – 3x| = -1/2
    => x in phi
    Vậy x in phi

  2. |5 – 3x| + 2/3 = 1/6
    => |5 – 3x| = 1/6 – 2/3
    => |5 – 3x| = 1/6 – 4/6
    => |5 – 3x| = -1/2
     => x in ∅
    (Vì  |5 – 3x| ≥0; -1/2 < 0)
    Vậy x in ∅

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222-9+11+12:2*14+14 = ? ( )

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