Question

the units digit of a two digit number is 3 and 7 times the sum of the digits is the number itself so find the number

Answer 1

Hi friend
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Your answer
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Let the tens digit be x.

Ones digit = 3 (given)

According to the question,
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Equation
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7(x + 3) = 10x + 3

7x + 21 = 10x + 3

7x - 10x = 3 - 21

-3x = -18

3x = 18

x = 18/3

x = 6

Therefore
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Tens digit = 6

Ones digit = 3

The number = 63

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