Question

2)
(x-2y = 0,
(2x + y = 5;

Answer 1

Ответ:

$x;y=[2;1]$

Объяснение:

$\left \{ {{x-2y=0} \atop {2x+y=5}} \right.\\\\\left \{ {{x=2y} \atop {2x+y=5}} \right.\\\\2 * (2y)+y=5\\5y=5\\y=5:5\\y=1\\\\x-2*1=0\\x-2=0\\x=2\\\\x;y=[2;1]$