x=3+10t (m,s)\(\Rightarrow\left\{{}\begin{matrix}xo=3\\v=10m/s\end{matrix}\right.\)
x=20t(km,h)\(\Rightarrow\left\{{}\begin{matrix}xo=0\\v=20km/h\end{matrix}\right.\)
x=2t+3(m,s)\(\Rightarrow\left\{{}\begin{matrix}xo=3\\v=2m/s\end{matrix}\right.\)
x=-10+5t(m,s)\(\Rightarrow\left\{{}\begin{matrix}xo=-10\\v=5m/s\end{matrix}\right.\)