Question

the sum of two consecutive number is 23. find the number.

Answer 1

let the no. are x and x+1
x+x+1=23
2x+1=23
2x=23-1
2x=22
x=22/2
x=11


the second no. is x+1=11+1=12.

Hope it is correct.
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Answer 2

Let the two consecutive numbers be n and n+1.
We know that their sum is 23. So,
n + (n+1) = 23
2n + 1 = 23
2n = 22
n = 22/2
n = 11
Therefore two consecutive nos. are 11 and 12