Answer:
(x, y) = (-7, 2)
Explanation:
Divide the second equation by 4 and add it to the first.
... (-x) +(4)/4 = (-6y+19) +(-4x -12y)/4
... -x +1 = -9y -x +19 . . . . simplify
... 9y = 18 . . . . . . . add 9y +x -1
... y = 2 . . . . . . . . . divide by 9
... -x = -6·2 +19 = 7
... x = -7
The solution is (x, y) = (-7, 2).