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

Toán Lớp 7: $\dfrac{3}{4}$ `+` $\dfrac{1}{4}$ `:` `x` `=` $\dfrac{-2}{5}$

Home/ Toán Lớp 7: $\dfrac{3}{4}$ `+` $\dfrac{1}{4}$ `:` `x` `=` $\dfrac{-2}{5}$

Toán Lớp 7: $\dfrac{3}{4}$ `+` $\dfrac{1}{4}$ `:` `x` `=` $\dfrac{-2}{5}$

Tháng Mười Hai 27, 2022 Toán học 2 Comments 0 views

Toán Lớp 7: $\dfrac{3}{4}$ + $\dfrac{1}{4}$ : x = $\dfrac{-2}{5}$

Comments ( 2 )

  1. kymmailien
    kymmailien
    27 Tháng Mười Hai, 2022 at 4:22 sáng
    Reply
    3/4 + 1/4 :x=-2/5
    1/4 :x=-2/5 – 3/4
    1/4 :x=-8/20 – 15/20
    1/4 :x=-23/20
    x=1/4 : (-23/20)
    x=5/-23
    Vậy x=5/-23

  2. thienthanh
    thienthanh
    27 Tháng Mười Hai, 2022 at 4:22 sáng
    Reply
    3/4 + 1/4 : x = -2/5
    1/4 : x = -2/5 – 3/4
    1/4 : x = (-8 – 15)/20
    1/4 : x = -23/20
    x = 1/4 : (-23/20)
    x = (1 . 20)/(4 . (-23))
    => x = 20/-92 = -5/23
    Vậy x = -5/23

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