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

Toán Lớp 6: A,11/12.x+3/4=-1/6 B,3-(1/6-x).2/3=2/3

Toán Lớp 6: A,11/12.x+3/4=-1/6 B,3-(1/6-x).2/3=2/3

Comments ( 2 )

  1. Giải đáp:
     
    Lời giải và giải thích chi tiết:
    A, 11/12.x+3/4=(-1)/6
                  11/12.x=(-1)/6-3/4
                  11/12.x=7/12
                              x=7/12: 11/12
                              x=7/11
    B,3-(1/6-x).2/3=2/3
            (1/6-x).2/3=3-2/3
            (1/6-x).2/3=7/3
                    1/6-x  =7/3:2/3
                    1/6-x  =7/2
                             x=1/6-7/2
                             x=10/3

  2. a) 11/12 . x + 3/4 = -1/6
    => 11/12 . x = -1/6 – 3/4
    => 11/12 x  =-11/12
    => x= -11/12 : 11/12
    => x=-1
    Vậy x= -1
    b) 3 – ( 1/6 – x) . 2/3 = 2/3
    => (1/6 -x) . 2/3 = 3 – 2/3
    => (1/6 -x) . 2/3 = 9/3 – 2/3
    => (1/6 -x) . 2/3 = 7/3
    => 1/6 -x = 7/3 : 2/3
    => 1/6 – x= 7/3 . 3/2
    => 1/6 -x =7/2
    => x = 1/6 – 7/2
    => x = 1/6 – 21/6
    => x=-10/3
    Vậy x = -10/3

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