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 6: tìm số nguyên x : 132-2(x-4)=46;6:(x+2)

Toán Lớp 6: tìm số nguyên x : 132-2(x-4)=46;6:(x+2)

Comments ( 2 )

  1. 132 – 2(x-4) = 46
    => 2(x-4) = 132 – 46
    => x – 4 = 86 : 2
    => x – 4 = 43
    => x = 43 + 4
    => x = 47
    ———————–
    6 \vdots (x + 2) 
    => x + 2 ∈ Ư(6)
    => Ư(6) = { -6;-3;-2;-1;1;2;3;6 }
    => x + 2 ∈ { -6;-3;-2;-1;1;2;3;6}
    => x = {-8;-5;-4;-3;-1;0;1;4}
     

  2. $1) 132 – 2 . (x – 4) = 46$
    $2 . (x – 4) = 132 – 46$
    $2 . (x – 4) = 86$
    $x – 4 = 86 : 2$
    $x – 4 = 43$
    $x = 43 + 4$
    $x = 47.$
    $2) 6$ chia hết cho $(x + 2)$
    Mà $6$ chia hết cho $1; 2; 3; 6; -1; -2; -3; -6.$
    → $x + 2 = 1; 2; 3; 6; -1; -2; -3; -6.$
    → $x = -1; 0; 1; 4; -3; -4; -5; -8.$

Leave a reply

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