Comment: Like this, I think

(See in situ)

In post: 2 Is 1
In reply to comment: I learned in high school, 1 (see in situ)

Like this, I think

x + y = 2x + 2y --> x + y = 0
x + y = 2(x + y)
(x + y) / (x + y) = 2(x + y) / (x + y)
1 = 2

This is fundamentally wrong but looks oh so right. :)