I cannot draw the graph into this editor.
Substitution or elimination will get you the answer about equally efficiently.
y=32/9 and x = 44/9
Multiply the 1st equation by3: 3x+6y=36
Subtract the 2nd equation from the first: 9y=32
From the 1st equation x = 12 - 2y, .e. x= 12-(64/9)=44/9