Question

A number consists of two digit whose sum is 8. if 18 is added to the number it's digit are reversed.Find the number

Answer 1

Let the number be xy
X+y = 8.
Also 10x+y +18 =10y+x
From here you will get two equations X and Y. Solve for x and y
The no is 35

Answer 2

$\huge\sf{Answer}$

Given :-

• Sum of 2-digit number = 8

• If 18 is added to the number, the digits change their places.

To Find :-

• The Number

______________________________

Let one of the number be x

And the other number be 8 - x

According to the question

⇒ 10x + (8 - x) + 18 = 10(8 - x) + x

⇒ 10x + 8 - x + 18 = 80 -10x + x

⇒ 9x + 26 = 80 - 9x

⇒ 9x + 9x = 80 - 26

⇒ 18x = 54

⇒ x = 54/18

⇒ x = 3

One Number = x = 3

Other number = 8 - x = 8 - 3 = 5

Hence, the number is 35.

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