Question

How do you solve this?

Answer 1

Find the soluiton

2x+2y=16
3x-y=4

x+y=8
3x-y=4+
4x=12
x=3
3(3)-y=4
9-y=4
y=5
(3,5)
test them to see if get true statment
obviously the first equatons of 1,2,4 work
1 doesn't work
2, works
4. doesn't work

2 is the same as the first except both euations are just doubled

answer is 2