-5x+4y=1 5x-y=2

{-5x+4y=1,
{5x-y=2;
{-5x+4y=1,
{-y=2-5x;
{-5x+4y=1,
{y=5x-2;
{-5x+20x-8=1,
{y=5x-2;
{15x=9,
{y=5x-2;
{x=0,6,
{y=5x-2;
{x=0,6,
{y=1.
Ответ: 0,6; 1.