Answer:
x=4,y=-1
Step-by-step explanation:
2x-4y=12...(1)
-2x+y=-9...(2)
Add (2) from (1)
-3y=3
Make y the subject of the formula by dividing both sides by -3
y=-1
Let's substitute the value of y into (1)
2x-4(-1)=12
2x+4=12
Substrate 4 from both sides
2x=8
Make x the subject of the formula by dividing both sides by 2
x=4
Therefore x is 4,y is-1
