Question

[huynh anh phuong]

Cho \(x=0\), \(y\ge1\).

Nếu \(y-y=x\)

       \(x\div y=x\)

Thì \(x-y=?\)

Answer 1

[nghia]

Có  \(x=0;y\ge1\)

Mà \(y-y=x\rightarrow y-y=0\)

      \(x\div y=x\rightarrow0\div y=0\)

\(\Rightarrow x-y=0-y=-y\)

Vậy \(x-y=-y\)

Answer 2

[Lê Quang Phúc]

\(x-y=-y\)