Question

the sum of three consecutive odd number is 21.Find the numbers​

Answer 1

Answer:

The three consecutive odd numbers are 5,7,9

Step-by-step explanation:                                                                                         Let the three consecutive odd number be x, x + 2,x + 4.

Given that the sum of 3 consecutive odd numbers is 21.

x + x + 2 + x + 4 = 21

3x + 6 = 21

3x = 21 - 6

3x = 15

x = 15/3

x = 5.

x + 2 = 5 + 2 =7

x + 4 = 5 + 4

        = 9.

Verification:

5 + 7 + 9 = 21

Answer 2

Answer:

The three consecutive odd numbers are 5, 7 & 9

Step-by-step explanation:

Let x,y,z be the three consecutive odd numbers

x + y + z = 21

x = y + 2

y = z + 2

3z + 6 = 21

3z = 21 - 6

3z = 15

z = 5

y = 5 + 2

y = 7

x = 7 + 2

x = 9

I tried my best to explain but I don't know whether this formula is correct or not