Answer:
x = - 3
y = 4
Step-by-step explanation:
x + y = 1 | (-3)
x + 3y = 9
- 3x - 3y = - 3
_____________
- 3x + x = 9 - 3
- 2x = 6
2x = - 6
- 3 + y = 1
y = 1 + 3
