Odpowiedź:
3x−4y=18 /· (-2)
6x+3y=3
-6x+8y = - 36
6x+3y=3
.............................................
11 y = - 33
y = -3
6x+3y=3
6x - 9 = 3
6x = 12
x = 2
Szczegółowe wyjaśnienie:
Odpowiedź:
[tex]\begin{cases}3x-4y=18\ \ /\cdot(-2)\\6x+3y=3\end{cases}\\\\\\+\begin{cases}-6x+8y=-36\\6x+3y=3\end{cases}\\----------\\11y=-33\ \ /:11\\y=-3\\\\\\6x+3\cdot(-3)=3\\\\6x-9=3\\\\6x=3+9\\\\6x=12\ \ /:6\\\\x=2\\\\\begin{cases}x=2\\y=-3\end{cases}[/tex]
