19 - 1= 20. How is it possible?

1.	19 - 1= 20. How is it possible?
Answer» In roman numerical 20 is written as XX<br>1. We can multiply both the sides with zero to equalise them.2. We can use\xa0roman numbers\xa0to prove this.19 is written as XXIX1 is written as I20 is written as XXXSo, we can write it as:XXIX - I = XXXHence, it is proved that 19-1= 20.

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