The sum of two consecutive numbers divided by their positive difference is equal to 9. Find the largest number.

Answer 1

the difference between any two consecutive numbers is just 1.
so, x + x+1 = 9
x = 4
the next number is 5

Answer 2

or
n + n-1 = 9
2 n = 10
n = 5
same old boring solution :)

Answer 3

or, following the wording:

(x + x+1)/(x+1 - x) = 9

2x +1 = 9
x = 4

same old

Answer 4

Thanks for the explanation