Question

Реши систему:

{z=8+t z−2t+2=3


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Answer 1

$\begin{cases} z = 8 + t \\ z-2t + 2 = 3\end{cases}\\\\\begin{cases} z-t = 8\\ z-2t =3-2\end{cases} \\\\\begin{cases} z-t = 8 \\ z-2t =1\ \ /*(-1)\end{cases}\\\\\begin{cases} z-t = 8 \\ -z+2t =-1\end{cases}\\+--------\\t=7$

$z = 8 + t\\z=8+7\\z=15\\\\\begin{cases} z = 15 \\ t=7\end{cases}$