Question

Set up equation and solve this when three consecutive natural number are added, the sum is 21.Find the number

Answer 1

Answer:

6 , 7 , 8

Step-by-step explanation:

We Have :-

Three consecutive natural number are added, the sum is 21

To Find :-

The numbers

Solution :-

Let the numbers be x , x + 1 , x + 2

Given that Sum of these numbers is 21

x + x + 1 + x + 2 = 21

3x + 3 = 21

x + 1 = 7

x = 6

The numbers are :-

6 , 7 , 8

Answer 2

Answer:

$\large{\underline{\boxed{\mathfrak\blue{Numbers \: are \: :- 6,7 \: \& \:8 }}}}$

Question:-

Set up equation and solve this when three consecutive numbers are added,the sum is 21.Find the numbers.

Solution:-

Given:-

• Sum of 3 consecutive numbers = 21

To find:-

• Numbers = ?

Let the numbers be a, a + 1 & a + 2.

ATQ:-

⇒ a + (a + 1) + (a + 2) = 21

⇒a + a + 1 + a + 2 = 21

⇒ 3a + 3 = 21

⇒ 3a = 21 - 3

⇒ 3a = 18

⇒ a = 18/3

⇒ a = 6

$\rule{100}{2}$

➜ 1st number = a = 6

➜ 2nd number = a + 1 = 6 + 1 = 7

➜ 3rd number = a + 2 = 6 + 2 = 8

$\therefore{\underline{\rm{Consecutive \: numbers = 6\: ,7 \: \& \: 8 \: }}}$