Proving that 1 + 1 = 3 ?

Here's one that's not too tricky to figure out where the problem is.
My fellow doctor Ethan made it up:

Let x=y. Then

x - y + y = y

x - y + y y
--------- = ---
x-y x-y

     y     y
1 + --- = ---
    x-y   x-y

      1 = 0

Now we know that 1 = 1, so add the following three equations together:

1 = 0
1 = 1
1 = 1

On the right is 1+1, and on the left is 3 ones, and 3 ones make 3.

Posted with STEMGeeks



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