Question

Find three consecutive numbers whose sum is 81?

Answer 1

let 3 number be (X),(x+2),(x+4)
so x+x+2+x+4 = 81
3x + 6 =81
3x = 81-6
3x = 75 
x= 75÷3
x = 25
x+2 = 25 + 2
       = 27 
x+4 = 25 +4
       = 29

Answer 2

Let "x" will be an unknown middle number.

Then the three numbers are (x-1), x and (x+1).

You are given that

(x-1) + x + (x+1) = 81, or, which is the same,

3x = 81.

Hence, x = 81%2F3 = 27.

So, your numbers are 26, 27 and 28.

hope it's helps ^_^

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