{ 2x + 3y = -2 | * 2
{ 4x - 5y = 7
{ 4x + 6y = -4
4x - 4x + 6y - (-5y) = -4 - 7
6y + 5y = -4 - 7
11y = -11
y = -1
2x + 3 * (-1) = -2
2x - 3 = -2
2x = 1
x = 0.5
ответ : (0.5 ; -1)
{ 2x + 3y = -2 | * 2
{ 4x - 5y = 7
{ 4x + 6y = -4
{ 4x - 5y = 7
4x - 4x + 6y - (-5y) = -4 - 7
6y + 5y = -4 - 7
11y = -11
y = -1
2x + 3 * (-1) = -2
2x - 3 = -2
2x = 1
x = 0.5
ответ : (0.5 ; -1)