Respuesta :

Putting x = 9 in to the equation.
18 + 3y = 12
3y = -6
y = -2
(9, -2)

Putting y = 4 in to the equation.
2x + 12 = 12
2x = 0
x= 0
(0, 4)
e87bs
18 + 3y = 12                hope it helps 
3y = -6
y = -2
(9, -2)