Răspuns:
Explicație pas cu pas:
[tex]\begin{gathered}\begin{cases}\bf -2x+y = -5~\big|\cdot 2\\\\\bf 3x-2y = 7\end{cases}\end{gathered}\implies\begin{gathered}\begin{cases}\bf -4x+2y = -10\\\\\bf 3x-2y = 7\end{cases}\end{gathered}[/tex]
- x / = -3
x = 3
[tex]\implies \begin{gathered}\begin{cases}\bf \boxed{\bf x = 3}\\\\\bf 3\cdot3-2y = 7\end{cases}\end{gathered}\implies \begin{gathered}\begin{cases}\bf \boxed{\bf x = 3}\\\\\bf -2y = 7-9\end{cases}\end{gathered}\implies \begin{gathered}\begin{cases}\bf \boxed{\bf x = 3}\\\\\bf -2y = -2\end{cases}\end{gathered}\implies[/tex]
[tex]\it~~[/tex]
[tex]\implies \begin{gathered}\begin{cases}\bf \boxed{\bf x = 3}\\\\\bf \boxed{\bf y = 1}\end{cases}\end{gathered}[/tex]
