Answer:
X=3,Y=-1
Step-by-step explanation:
This question is based on elimination method
X-Y=4...(1)
X+Y=2...(2)
Add (1) and (2)
2x=6
Make x the subject of formula by dividing both sides by 2
X=3
Let's substitute the value of x into (1)
3-Y=4
Substrate 3 from both sides
-Y=1
Divide both sides by-
Y=-1
Therefore x is 3 and Y is -1
