Question

x+y=1
x-y=1
xy=1
x/y=1​

Answer 1

If x+y=1

x=1-y

If x-y=1

x=1+y

If xy=1

x=1/y

If x/y=1

x=y

Answer 2

Answer:

This question is completely wrong.

If x+y=1

then how can x-y=1.