Question

tìm số nguyên x,y biết:  x-2xy + x =0

Answer 1

`<=> 2x - 2xy = 0`

`<=>2x(1-y) = 0`

`<=>` \(\left[{}\begin{matrix}x=0\\1-y=0\end{matrix}\right.\)

`<=>` \(\left[{}\begin{matrix}x=0\\y=1\end{matrix}\right.\)

Answer 2

 [x=01−y=0[x=01−y=0

 [x=0y=1