Question

If a=x, then a+a=a+x, 2a=a=x, 2a-2x=(a+x)-2x, 2(a-x)=a-x, then 2=1?? How is this possible?

Answer 1

Sorry,in the second line its 2a=a+x. My apologies.

Answer 2

If a = x, then a - x = 0.

When you take the expression 2(a-x)=a-x

and divide by (a -x), you are dividing by 0.

Division by zero is undefined.
Therefore, you cannot correctly conclude that 2 = 1.

Answer 3

Thanks.