Question

in a two digital number digital in unit place is twice the digital in tenth place if 27 is added to it digit are reversed find the number​

Answer 1

Answer:

The number is 36

Step-by-step explanation:

Let,

Tens digit = x  

Units digit = 2x

Original No = 10x + 2x = 12x

Reverse No. = 10 (2x) + x = 21x

➙ 12x + 27 = 21x

➙ 12x - 21x = -27

➙ - 9x = - 27

➙ 9x = 27

➙ x = 27 / 9

➙ x = 3

Tens digit = 3

Units digit = 2x

➙ 2 (3)

➙ 2 × 3

➙ 6

Units digit = 6

Therefore,

The number is 36

★ Verification :

If 27 is added to it digit are reversed

36

+ 27

-----------

63

----------

Answer 2

Answer:

36 is the req. No.

Step-by-step explanation:

Let the tens digit be x

then the unit digit be 2x

Original No = 10x + 2x = 12x

Reversed No. = 10 (2x) + x = 21x

12x + 27 = 21x

=> 12x - 21x = -27

=> - 9x = - 27

=> 9x = 27

=> x = 27 / 9

=> x = 3

Now,

Tens digit = x = 3

Units digit = 2x = 2×3 = 6

Original no. = 36 .

Verification

Original no. + 27 = reversed no. ..... Given

36 + 27 = 63

Verified.....