xy-x=4
2X+y=7
xy - x = 4
y=7-2x
x(7-2x) - x =4
x=1
x=2
y=7-2*1
y=7-2*2
y=5
y=3
(x1 , x2) = 1, 5
(y1 , y2) = 2,3
xy-x=4
2X+y=7
xy - x = 4
y=7-2x
x(7-2x) - x =4
x=1
x=2
y=7-2*1
y=7-2*2
y=5
y=3
(x1 , x2) = 1, 5
(y1 , y2) = 2,3