We start with the following equality:

0 = 0We can write equality as follows:

3-3 = 4-4We highlight 3 and 4:

3 (1-1) = 4 (1-1)We cut the common terms in parentheses and come to equality:

3 = 4Obviously this demonstration has an error because we all know that 3 is not equal to 4 (or does anyone have any questions?). Click below to find out what the error is:

In this demonstration comes a stage where we have:

**3 (1-1) = 4 (1-1)**

According to the demonstration, the next step is to cut the common members in parentheses.

**There is the mistake !!!**

It's wrong because what we have in parentheses is 1-1, which is 0. So we would be dividing both sides by zero. Division by zero does not exist !!!

Next: 7 is equal to 8?