Question

The sum of three consecutive numbers is 21 find the number

Answer 1

Answer:

6 , 7 , 8

Step-by-step explanation:

let the first no. = x

let the consecutive numbers = x , x+ 1 , x + 2

x + x + 1 + x + 2 = 21

3x + 3 = 21

3x = 21 - 3

3x = 18

x = 18/3 = 6

x = 6

Answer 2

Step-by-step explanation:

Let the No's be x, x+1, x+2

according to the question,

x + (x+1) + (x+2) = 21

3x + 3 = 21

3x = 21 - 3 = 18

x = 18/3 =6

1st no = x = 6

2nd no = x+1 = 7

3rd no = x+2 = 9