Question

ajutatima am 10 minute sa o fac dau 5 puncte coroana si 100 points​

Answer 1

Răspuns:

Explicație pas cu pas:

$\begin{gathered}\begin{cases}\bf -2x+y = -5~\big|\cdot 2\\\\\bf 3x-2y = 7\end{cases}\end{gathered}\implies\begin{gathered}\begin{cases}\bf -4x+2y = -10\\\\\bf 3x-2y = 7\end{cases}\end{gathered}$    

                                                   - x      /    = -3  

                                                     x = 3    

$\implies \begin{gathered}\begin{cases}\bf \boxed{\bf x = 3}\\\\\bf 3\cdot3-2y = 7\end{cases}\end{gathered}\implies \begin{gathered}\begin{cases}\bf \boxed{\bf x = 3}\\\\\bf -2y = 7-9\end{cases}\end{gathered}\implies \begin{gathered}\begin{cases}\bf \boxed{\bf x = 3}\\\\\bf -2y = -2\end{cases}\end{gathered}\implies$

$\it~~$

$\implies \begin{gathered}\begin{cases}\bf \boxed{\bf x = 3}\\\\\bf \boxed{\bf y = 1}\end{cases}\end{gathered}$