Lời giải:
a. \((\Delta): \left\{\begin{matrix} x=-3+2t\\ y=4+t\end{matrix}\right.\)
b. \((\Delta '): \left\{\begin{matrix} x=2+2t\\ y=5+t\end{matrix}\right.\)
\(a,\left(\Delta\right):\left\{{}\begin{matrix}x=-3+2t\\y=4+t\end{matrix}\right.\)
\(b,\left(\Delta'\right):\left\{{}\begin{matrix}x=2+2t\\y=5+t\end{matrix}\right.\)