Question

Disprove the following
a=x
a+a=a+x
2a=a+x
2a-2x = a+x-2x
2(a-x) = a+x-2x
2(a-x) = a-x
2=1
Problem?

Answer 1

as my dad says: "Because I said so!!" :)

Answer 2

divide by zero.

Answer 3

dividing by zero in the step
2(a-x) = a+x-2x 2(a-x) = a-x

Answer 4

well actually in this step
2(a-x) = a-x
2=1

left hand side is
\[2\times 0\] right hand side is 0
cannot divide by zero to show that 2 = 1

Answer 5

Haha well done