could someone please explain this to me!!

Answer:
I'll explain
Step-by-step explanation:
(Pssst, THERE ARE STEPS RIGHT THERE!!)
HoPe YoU eNjOy My AnSwEr
Answer:
x = -3, y = 2
Step-by-step 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