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 x thuộc N, biết: a) 27-7.(x+1)=20

Toán Lớp 6: Tìm x thuộc N, biết:
a) 27-7.(x+1)=20

Comments ( 2 )

  1. $\text{27 – 7( x +1) = 20 }$
    $\text{7( x +1) = 27 – 20}$
    $\text{7(x+ 1) = 7}$
    $\text{x+1 = 7 : 7}$
    $\text{x +1 = 1}$
    $\text{x = 1 – 1 }$
    $\text{x = 0}$
    $\text{Vậy x = 0}$

  2. a, 27-7.(x+1)=20
    7.(x+1)=27-20
    7x+7=7
    7x=7-7
    7x=0
    x=0:7
    x=0

Leave a reply

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