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

Toán Lớp 7: $\frac{x-1}{2}$ =x-$\frac{x-2}{3}$

Home/ Toán Lớp 7: $\frac{x-1}{2}$ =x-$\frac{x-2}{3}$

Toán Lớp 7: $\frac{x-1}{2}$ =x-$\frac{x-2}{3}$

Tháng Mười 27, 2022 Toán học 2 Comments 0 views

Toán Lớp 7: $\frac{x-1}{2}$ =x-$\frac{x-2}{3}$

Comments ( 2 )

  1. truongthanhhung
    truongthanhhung
    27 Tháng Mười, 2022 at 3:27 chiều
    Reply
    $\#Lynn2007$
    – Bỏ x
    (x-1)/2=(x-2)/3
    <=>3(x-1)=2(x-2)
    <=>3x-3=2x-4
    <=>3x-3-2x+4=0
    <=>x+1=0
    <=>x=-1
    \text{Vậy:} x=-1.
     

    toan-lop-7-frac-1-2-frac-2-3

  2. kimlien
    kimlien
    27 Tháng Mười, 2022 at 3:27 chiều
    Reply
    (x-1)/2=x-(x-2)/3
    ⇔(x-1)/2=(3x)/2-(x-2)/3
    ⇔(x-1)/2=(3x-x+2)/3
    ⇔(x-1)/2=(2x+2)/3
    ⇔(x-1).3=(2x+2).2
    ⇔3x-3=4x+4
    ⇔3x-3-4x-4=0
    ⇔-x-7=0
    ⇔x=-7
    b,
    Bỏ x
    (x-1)/2=(x-2)/3
    ⇔(x-1).3=(x-2).2
    ⇔3x-3=4x-4
    ⇔3x-3-4x+4=0
    ⇔-x+1=0
    ⇔x=1
    Vậy x=1

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

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