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

Toán Lớp 7: $\frac{2}{5}$+|$\frac{1}{2}$-x|=6 ae hộ mik

Toán Lớp 7: $\frac{2}{5}$+|$\frac{1}{2}$-x|=6
ae hộ mik

Comments ( 2 )

  1. 2/5+|1/2-x|=6
    |1/2-x|=6- 2/5
    |1/2-x|=28/5
    +)1/2-x=28/5
    x=1/2 – 28/5
    x=-51/10
    +)1/2-x=-28/5
    x=1/2-(-28/5)
    x=61/10
    Vậy x in {61/10;-51/10}

  2. Giải đáp + Lời giải và giải thích chi tiết:
     2/5 + |1/2 – x| = 6
    ⇒ |1/2 – x| = 6 – 2/5
    ⇒ |1/2 – x| = 28/5
    TH1: 1/2 – x = 28/5
    ⇒ x = 1/2 – 28/5 = -51/10
    TH2: 1/2 – x = -28/5
    ⇒ x = 1/2 – (-28/5) = 61/10
    Vậy x ∈ {-51/10; 61/10}

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