Question

Solve for X &Y.
X+Y=1
X-Y=1
Also Y is not equal to 0

Answer 1

$x + y = 1 \: \: - - - - - - i\\ x - y = 1 \: \: - - - - - - ii$
eliminating eq. i and ii
2x=2
x=1
put in eq. i
y=0
therefore is 0 only.....
otherwise your answer will be
in fraction