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: 7)12(x – 1) : 3 = 4³ + 2³ 13) [(6x – 39) : 7]. 4 = 12 (x : 23 + 45) . 67 = 8911

Toán Lớp 6: 7)12(x – 1) : 3 = 4³ + 2³
13) [(6x – 39) : 7]. 4 = 12
(x : 23 + 45) . 67 = 8911

Comments ( 2 )

  1. $1)12(x – 1) : 3 = 4³ + 2³$
    $12(x – 1) : 3 = 64 + 8$
    $12(x – 1) : 3 = 72$
    $12(x – 1)  = 72.3$
    $12(x – 1)  = 216$
    $x – 1  = 216:12$
    $x – 1  = 18$
    $x=18+1$
    $x=19$
    Vậy $x=19$
    $2)[(6x – 39) : 7]. 4 = 12$
    $(6x – 39) : 7 = 12:4$
    $(6x – 39) : 7 = 3$
    $6x-39=3.7$
    $6x-39=21$
    $6x=21+39$
    $6x=60$
    $x=60:6$
    $x=10$
    Vậy $x=10$
    $3)(x : 23 + 45) . 67 = 8911$
    $x : 23 + 45  = 8911:67$
    $x : 23 + 45  = 133$
    $x : 23   = 133-45$
    $x : 23   =88$
    $x=88.23$
    $x=2024$
    Vậy $x=2024$
     

  2. Lời giải và giải thích chi tiết:
    12(x – 1) : 3 = 4^3 + 2^3
    ⇒ 12(x – 1) : 3 = 64 + 8 = 72
    ⇒ 12(x – 1) = 216
    ⇒ x – 1 = 18
    ⇒ x = 19
    [(6x – 39) : 7] . 4 = 12
    ⇒ (6x – 39) : 7 = 3
    ⇒ 6x – 39 = 21
    ⇒ 6x = 60
    ⇒ x = 10
    (x : 23 + 45) . 67 = 8911
    ⇒ x : 23 + 45 = 133
    ⇒ x : 23 = 88
    ⇒ x = 2024

Leave a reply

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