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

Toán Lớp 6: 1/6×(2x-3)=1/2×(1/3×x-1/4)-1/7

Tháng Hai 6, 2023 Toán học 2 Comments 0 views

Toán Lớp 6: 1/6×(2x-3)=1/2×(1/3×x-1/4)-1/7

Comments ( 2 )

  1. kimlien
    kimlien
    6 Tháng Hai, 2023 at 10:53 chiều
    Reply
    1/6 xx ( 2x – 3 ) = 1/2 xx ( 1/3 xx x – 1/4  ) – 1/7
    ⇔ 1/6 xx 2x – 1/6 xx 3 = 1/2 xx 1/3 xx x – 1/2 xx 1/4 – 1/7
    ⇔ 1/3 x – 1/2 = 1/6 x – 1/8 – 1/7
    ⇔ 1/3 x – 1/6 x = – 1/8 + 1/7 + 1/2
    ⇔ x . ( 1/3 – 1/6 ) = 13/56
    ⇔ x . 1/6 = 13/56
    ⇔ x = 13/56 : 1/6
    ⇔ x = 39/28
    Vậy , x = 39/28 .

  2. truongthanhhung
    truongthanhhung
    6 Tháng Hai, 2023 at 10:52 chiều
    Reply
    1/6(2x-3) =1/2(1/3x – 1/4) -1/7
    -> 1/3x – 1/2 = 1/6x – 1/8 – 1/7
    -> 1/3x – 1/6x = -1/8 -1/7 +1/2
    -> 1/6x = 13/56
    -> x = 13/56 . 6 = 39/28
    Vậy x =39/28  
     

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

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