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 ∈ Z sao cho: X/4 = 3/10

Tháng Sáu 9, 2022 Toán học 2 Comments 0 views

Toán Lớp 7: Tìm X ∈ Z sao cho:
X/4 = 3/10

Comments ( 2 )

  1. giangnguyen33
    giangnguyen33
    9 Tháng Sáu, 2022 at 1:27 sáng
    Reply
    $\text{Cách 1:}$
    x/4 = 3/10
    $\Rightarrow$ {5x}/20 = 6/20
    $\Rightarrow$ 5x = 6
    $\Rightarrow$ x = 6 : 5
    $\Rightarrow$ x = 6/5
    $\text{Vậy}$ x = 6/5
    ____________________
    $\text{Cách 2:}$
    x/4 = 3/10
    $\Rightarrow$ 10x = 3.4
    $\Rightarrow$ 10x = 12
    $\Rightarrow$ x = 12 : 10
    $\Rightarrow$ x = 6/5
    $\text{Vậy}$ x = 6/5

  2. diemchau
    diemchau
    9 Tháng Sáu, 2022 at 1:27 sáng
    Reply
    Ta có:
    x/4 = 3/10
    ⇒ x . 10 = 3 . 4 
    x . 10 = 12
    x = 12/10
    x = 1,2
    Vậy x = 1,2

Leave a reply

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

Bích Hằng

About Bích Hằng