Register Now

Login

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

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

Toán Lớp 7: Tìm x,y: f,/3x-1/+/3x-2/+/3x-3/+/3x-4/=4

Home/ Toán Lớp 7: Tìm x,y: f,/3x-1/+/3x-2/+/3x-3/+/3x-4/=4

Toán Lớp 7: Tìm x,y: f,/3x-1/+/3x-2/+/3x-3/+/3x-4/=4

Tháng Sáu 30, 2022 Toán học 2 Comments 0 views

Toán Lớp 7: Tìm x,y:
f,/3x-1/+/3x-2/+/3x-3/+/3x-4/=4

Comments ( 2 )

  1. daithanh
    daithanh
    30 Tháng Sáu, 2022 at 8:01 sáng
    Reply
    |3x-1|+|3x-2|+|3x-3|+|3x-4|=4
    |3x-1+3x-2+3x-3+3x-4|=4
    |4.(3x)-10|=4
    |12x-10|=4
    +)12x-10=4
    12x=4+10
    12x=14
    x=14:12
    x=7/6
    +)12x-10=-4
    12x=-4+10
    12x=6
    x=6:12
    x=1/2
    Vậy x={1/2;7/6}

  2. huenthanh97
    huenthanh97
    30 Tháng Sáu, 2022 at 8:01 sáng
    Reply
     f) |3x – 1| + | 3x – 2| + |3x – 3| + |3x – 4| = 4
    => | 3x – 1 + 3x -2 + 3x – 3 + 3x – 4| = 4
    => | 12x – 10| = 4
    => \(\left[ \begin{array}{l}12x – 10 = 4\\12x – 10 = -4\end{array} \right.\) 
    =>\(\left[ \begin{array}{l}12x=14\\12x=6\end{array} \right.\) 
    =>\(\left[ \begin{array}{l}x=7/6\\x=1/2\end{array} \right.\) 
    Vậy x ∈ { 7/6 ; 1/2 }

Leave a reply

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

Mộng Tâm

About Mộng Tâm