Question

\(\left\{{}\begin{matrix}x+2y=3\\2x+4y=m\end{matrix}\right.\)Giải hệ phương trình

Answer 1

\(\left\{{}\begin{matrix}x+2y=3\\2x+4y=m\end{matrix}\right.\\ =>\left\{{}\begin{matrix}2x+4y=6\\2x+4y=m\end{matrix}\right.\\ =>m=6\\ =>x;yvn\)

Answer 2

\(\left\{{}\begin{matrix}x+2y=3\\2x+4y=m\end{matrix}\right.\\ \Leftrightarrow\left\{{}\begin{matrix}2x+4y=6\\2x+4y=m\end{matrix}\right.\\ \Leftrightarrow m=6\)