Answer:
( - 1, 1 )
Step-by-step explanation:
Given the 2 equations
3x - y = - 4 → (1)
x + y = 0 → (2)
Subtract y from both sides in (2)
x = - y → (3)
Substitute x = - y into (1)
- 3y - y = - 4, that is
- 4y = - 4 ( divide both sides by - 4 )
y = 1
Substitute y = 1 into (3)
x = - 1
Solution is (- 1, 1 )
