Answer:
0
Step-by-step explanation:
The explanation is in the attached file.
Sidenote: Hope this helps! :D
x=1
0=4x-4
-4=4x
hope this helps:)
y=1, x=2
x+y=3
x-y=1
Using elimination method
x-x+y--y=3-1
2y= 2
y=1
Substitute y=1 into equation 2
x-1=1
x=1+1
x=2