Answer:
The answer is x = -5, y = -5
Step-by-step explanation:
Use the method of elimination
Rearrange the equations
x = -y - 10 → x + y = -10
-x + y = 0
x + y = -10
Add these two equations together to eliminate the xs
2y = -10
y = -5
-x + y = 0
-x -5 = 0
-x = 5
x = -5
(-5,-5) Is the solution
