Answer:

and seven times the sum of the digits is the number itself. The tens digit is 6 and the units digit is 3, so the number is 63.

Step-by-step explanation:

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Answer:

Let the number be X3

Acc. to question

7(x+3) =10x+3

7x+21=10x+3

10x-7x=21-3

3x=18

x=18/3=6

x=6

The number=63