$\{\begin{array}{ll}3x+6y=0& \\ 2x-y-5=0& \end{array}$
3x + 6y = 0
6y = −3x
$y=-\frac{1}{2}x$

2x − y − 5 = 0
−y = 5 − 2x
y = 2x − 5


Ответ: (2; −1)

$\{\begin{array}{ll}-x-2y+4=0& \\ 2x-y-3=0& \end{array}$
−x − 2y + 4 = 0
−2y = x − 4
2y = 4 − x
$y=2-\frac{x}{2}$

2x − y − 3 = 0
−y = 3 − 2x
y = 2x − 3


Ответ: (2; 1)

$\{\begin{array}{ll}0,5x-2y=0& \\ x-y-3=0& \end{array}$
0,5x − 2y = 0
−2y = −0,5x
y = 0,25x

x − y − 3 = 0
−y = 3 − x
y = x − 3


Ответ: (4; 1)

$\{\begin{array}{ll}x-3y+6=0& \\ -2x+y+3=0& \end{array}$
x − 3y + 6 = 0
−3y = −x − 6
3y = x + 6
$y=\frac{x}{3}+2$

−2x + y + 3 = 0
y = 2x − 3


Ответ: (3; 3)