Question

can u prove
$19 - 1 = 20$

pls help me
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Answer 1

Answer:

Let us take 19 stones. -1 means you're removing one stone, right? So, if you remove 1 stone from a set of 19 stones, then how many stones do you have left? Obviously 18. So $19-1\neq20$.

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Answer 2

Answer:

$19 - 1 = 18$

hence it is not equal to 20