Answer:
x=8
y=-3
Step-by-step explanation:
let
x+y=5........ equation 1
x-4y=20....... equation 2
x=20+4y
substituting the value of x in eq 1
x+y=5
20+4y+y=5
5y=5-20
y=-15/5
again putting the value of y in eq 2
x=20+4(-3)
x=20-12
