Question

the unit digit of a two digit number is 3.The number is 7times the sum of the digit. find the number?​

Answer 1

Answer:

The tens digit is 6 and the units digit is 3, so the number is 63.

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Answer 2

Answer:

The required number is 63.

Step-by-step explanation:

Given :

The unit digit of a two digit number is 3. The number is 7 times the sum of the digits.

To find :

the number

Solution :

Let the tens digit of the number be 'x'

Then, the number = 10x + 3

According to the question,

7 × (sum of the digits) = number

7(x + 3) = 10x + 3

7x + 21 = 10x + 3

10x - 7x = 21 - 3

3x = 18

 x = 18/3

 x = 6

Therefore, the tens digit is 6.

Then, the number = 10x + 3

 = 10(6) + 3

 = 60 + 3

 = 63

The required number is 63.