Question 929007
xy = -18
x/y = -2 ----> x = -2y


Substitute the second equation into the first equation.


xy = -18
(-2y)(y) = -18
-2y^2 = -18
y^2 = 9
y = 3 or -3


Solutions = (x, y) = (6, -3) or (-6, 3)