Answer: x=6 and y=-1
Step-by-step explanation:
y=-x+5---> x+y=5----> 4(x+y=5)
4x+4y=20
x-4y=10
4y and -4y cancel each other out
5x=30----> x=6
Now replace x with 6 in the second equation
6-4y=10
-4y=4----> y=-1
Double check
-1=-6+5
-1=-1
6-4*-1=10
6+4=10
10=10
