Can you prove 2=1???

Question

No! But I can prove... let us see how?

x = y

2x = 2y

2x - x = 2y - y

2x - 2y = x - y

2 (x - y) = x - y

2 = 1

Oh!!! Shahzad you are great.

I have changed the mathematics history.

Answer 1

if x = y

and at the end you x-y / x-y = 1 is not true

because if x = y so x-x / x-x = 0 / 0 is different than 1

you can't say 2 = 1

mathematics history is not changed by this fault simplification.

Answer 2

Cute, but the old "secret division by zero" trick is older than Bea Arthur.

Answer 3

Oh, great Shahzad, thou art a fraud!

Dividing by zero with a wink and a nod.

Yet for this you expect us to laud?

Answer 4

This is the fundamental theory of how stupid you are.

Answer 5

who are you talking to??

Answer 6

We all know that:

   0 = 0

then, 2-2 = 1-1

by factoring

2(1-1) = 1(1-1)

by left and right cancellation

we say that 2 = 1

Answer 7

Ah! The Great Shadzad done in by a lowly Pawdog.

Answer 8

Actually if x=y, then the line: 2 (x - y) = x - y is equivalent to:

                                                2(0) = 0

                                                  0    = 0

The statement above would be true, it wouldn't be 2=1.

Sorry.

Answer 9

2 + 2 = 5 for abnormally large values of 2 and small values of 5 with significant figures.

2.4 + 2.4 = 4.8

where 2.4 is 2, and 4.8 is 5...

"In the end the Party would announce that two and two made five, and you would have to believe it. It was inevitable that they should make that claim sooner or later: the logic of their position demanded it. Not merely the validity of experience, but the very existence of external reality, was tacitly denied by their philosophy. The heresy of heresies was common sense. And what was terrifying was not that they would kill you for thinking otherwise, but that they might be right. For, after all, how do we know that two and two make four? Or that the force of gravity works? Or that the past is unchangeable? If both the past and the external world exist only in the mind, and if the mind itself is controllable—what then?" -1984, orwell...