Question 699383
x + 2y + 1 = 0
:
xy - y = 0
xy = y
divide both sides by y
x = 1
:
Replace x in the 1st equation with 1, find y
1 + 2y + 1 = 0
2y + 2 = 0
2y = -2
y = -1
:
solution: x=1, y=-1