Hej!
{5x - 2y = 1 / * 2
{-3x + 4y = 5
{10x - 4y = 2
+ {-3x + 4y = 5
----------------------
7x = 7 / : 7
x = 1
5 * 1 - 2y = 1
5 - 2y = 1
-2y = 1 - 5
-2y = -4 / : (-2)
y = 2
Pozdrawiam! - Julka
Odpowiedź:
[tex]\begin{cases}5x-2y=1\ \ /*2\\-3x+4y=5\end{cases}\\\\\\+\begin{cases}10x-4y=2\\-3x+4y=5\end{cases}\\--------\\7x=7\ \ /:7\\x=1\\\\\\5*1-2y=1\\\\5-2y=1\\\\-2y=1-5\\\\-2y=-4\ \ /:(-2)\\\\y=2\\\\\begin{cases}x=1\\y=2\end{cases}[/tex]
