2=-1 Unbelievable Math Proof
1. Let us consider any two equal non-zero quantities x and y. x=y 2. Adding and subtracting x on left hand side of equation while adding and subtracting y on right hand side of the equation x+x-x=y+y-y 3. Let us proceed as follows 2x-x=2y-y 2x-2y=-y+x 4. Taking 2 common from left hand side of equation [...]