Answer:
The two lines intersect at (6, -4) which is the solution to this system of equations.
x = 6
y = -4
[tex]\left \{ {{-3x-9y = 18} \atop {4x+3y=12}} \right.[/tex] can be rewritten as [tex]\left \{ {{y=-\frac{1}{3}x-2 } \atop {y=-\frac{4}{3}x+4 }} \right.[/tex] to make graphing easier.
