What are 3 consecutive numbers whose sum is 54?

Another approach

The three number are: 17, 18 and 19

Let the first number be ##n## then we have: ##n+(n+1)+(n+2)=54##

##=> 3n+3=54##

##=> 3n=54-3##

##=>n=51/3=17##

So we have :##17+18+19=54##

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