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

Toán Lớp 6: 2/5-1/5:x=25% -5/6-x=7/12+-1/3

Toán Lớp 6: 2/5-1/5:x=25% -5/6-x=7/12+-1/3

Comments ( 2 )

  1. Giải đáp:
     
    Lời giải và giải thích chi tiết:
     2/5-1/5:x=25%
    ⇔2/5-1/5:x=1/4
    ⇔          1/5:x=2/5-1/4
    ⇔          1/5:x=3/20
    ⇔          x=4/3
    -5/6-x=7/12+-1/3
    ⇔-5/6-x=1/4
    ⇔           x=-13/12

  2. 2/5 – 1/5 : x = 25%
    2/5 – 1/5 : x = 1/4
    1/5 : x = 2/5 – 1/4
    1/5 : x = 3/20
    x = 1/5 : 3/20
    x = 4/3
    Vậy x = 4/3
    -5/6 – x = 7/12 + (-1)/3
    -5/6 – x = 1/4
    x  = -5/6 – 1/4
    x= -13/12
    Vậy x = -13/12

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

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