Answer:
x = -3, y = 2
Explanation:
x + y = -1
-4x - 3y = 6
-3x -3y = 3 (multiply first equation by -3 so y is the same on both equations)
-x = 3 (subtract both equations
x = -3
Now substitute x = -3 into any of the original equations.
x + y = -1
-3 + y = -1
y = 2