Answer:
[tex]\boxed{x = 0}[/tex]
[tex]\boxed{y = 9/2}[/tex]
Step-by-step explanation:
[tex]\textbf{\textrm{1. Eliminate the 4 by making one equation negative}}[/tex]
-(3x + 4y = 18)
-3x - 4y = -18
-2x + 4y = 18
-5x = 0
x = 0
[tex]\textbf{\textrm{2. Plug X back into the equation to solve for y}}[/tex]
3(0) + 4y = 18
4y = 18
18/4 = y
y = 9/2