Verified answer

4xy - x/y = 30 |*2

3xy + 2x/y = 28

и складываем

8xy - 2x/y + 3xy + 2x/y = 60 + 28

11xy = 88

xy = 8

3*8 + 2x/y = 28

x/y = 2

x = 2y

2y*y = 8

y² = 4

y1 = 2 x1 = 4

y2 = -2 x2 = -4

ответ (4,2)(-4,-2)