Question

Answer 1

a: \(\Leftrightarrow\left\{{}\begin{matrix}6x-3y=-15\\x+3y=1\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x=-2\\y=2x+5=-4+5=1\end{matrix}\right.\)

b: \(\Leftrightarrow\left\{{}\begin{matrix}4x-6y=10\\9x+6y=16\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x=2\\y=\dfrac{1}{3}\end{matrix}\right.\)

Answer 2

a \(\left\{{}\begin{matrix}x=-2\\y=1\end{matrix}\right.\)

b \(\left\{{}\begin{matrix}x=2\\y=\dfrac{-1}{3}\end{matrix}\right.\)