7x - 3y = 2
-2x + 2y = 20
2y =2x + 20
y = x + 10
7x - 3(x + 10) = 2
7x - 3x - 30 = 2
4x = 32
x = 8
y = 8 + 10
y = 18
ответ: (8; 18)
7x - 3y = 2
-2x + 2y = 20
7x - 3y = 2
2y =2x + 20
7x - 3y = 2
y = x + 10
7x - 3(x + 10) = 2
7x - 3x - 30 = 2
4x = 32
x = 8
y = 8 + 10
y = 18
ответ: (8; 18)