Question

2х-3у=-18
ху=-12                                               .

Answer 1

2х - 3у = -18
ху = -12

х = -12/у

2*(-12/у) - 3у = -18
-24 - 3у^2 = -18у
-3(8 + у^2) = -3*6у
у^2 - 6у  + 8 = 0
(у - 4)(у - 2) = 0
у1 = 4,  у2 = 2.

х = -12/у
х1= -12/4 = -3
х2 = -12/2 = -6