Let:                          x = 1
so:                           x = x
square both:                  x= x
subract x from both sides:   x - x = x - x
factor both sides:            x(x-x) = (x+x)(x-x)
Divide both sides by (x-x):   x=(x+x)
Since x=1:                    1=(1+1)
So:                           1=2
