{ x - 2y = -12 // * 5
{ 7x - 10y = 7
{ 5x - 10y = -60
7x - 10y - 5x + 10y = 7 + 60
2x = 67
x = 33.5
33.5 - 2y = -12
16.75 - y = -6
y = 22.75
ответ: (33.5; 22.75).
{ x - 2y = -12 // * 5
{ 7x - 10y = 7
{ 5x - 10y = -60
{ 7x - 10y = 7
7x - 10y - 5x + 10y = 7 + 60
2x = 67
x = 33.5
33.5 - 2y = -12
16.75 - y = -6
y = 22.75
ответ: (33.5; 22.75).