For my Mathematician friends

Did you know?

1 = 2

 

Start                                       Let  X=Y

Multiply by Y                       XY = YY

Subtract X2                           XY – XX = YY – XX

Factorise                               X(Y – X) = (Y+X)(Y-X)

Divide by (Y-X)                    X = Y+X

X= X+X

X = 2X

1 = 2     !!!

Can you spot the deliberate mistake?
 

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