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 các số nguyên x,y biết: 2x+xy+y=5

Toán Lớp 6: Tìm các số nguyên x,y biết:
2x+xy+y=5

Comments ( 2 )

  1. 2x + xy + y = 5
    2x + xy + y – y =5 – y
    2x + xy = 5 – y
    x (2 + y) = 5 – y
    x(2 + y) 5 y
    = – ; y khác – 2
    2 + y 2 + y 2 + y
    5 – y
    x = ; y khác – 2
    2 + y

  2. $2x+xy+y=5$
    $2x+xy+y-y=5-y$
    $2x+xy=5-y$
    $x\left(2+y\right)=5-y$
    $\frac{x\left(2+y\right)}{2+y}=\frac{5}{2+y}-\frac{y}{2+y};\quad \:y\ne \:-2$
    $x=\frac{5-y}{2+y};\quad \:y\ne \:-2$

Leave a reply

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