{2x−y=6, <=> {y = 2x-6,
{x−2,5y=11 {x - 2.5(2x-6) = 11
x - 2.5(2x-6) = 11
x - 5x + 15 = 11
-4x = 11-15
-4x = -4
x = 1 y = 2 * 1 - 6
y = 2-6
y = -4
(1; -4) - решение системы
{2x−y=6, <=> {y = 2x-6,
{x−2,5y=11 {x - 2.5(2x-6) = 11
x - 2.5(2x-6) = 11
x - 5x + 15 = 11
-4x = 11-15
-4x = -4
x = 1 y = 2 * 1 - 6
y = 2-6
y = -4
(1; -4) - решение системы