How to Prove 2=1 ?

Lets, x = y …(1)

Multiply by 2 both sides,
2x = 2y …(2)

Subtracting eq. (1) from (2),
2x – x = 2y -y

Rearranging them,
2x – 2y = x – y

Dividing both sides by (x-y)
2(x-y)/(x-y) = (x-y)/(x-y)

Hence,
2 = 1 Proved.