Question

the unit of digit of two digit number is 3 and 7 times the sum of the digits is the number itself. find the number.​

Answer 1

Answer:

so,the number is 63

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Answer 2

Answer:

The digit of  the units place a two-digit number is  3

u=3

and seven times the sum of the digits is the number itself.

7(t+u) = 10t+u

Substituting u=3:

7(t+3) = 10t+3

7t+21 = 10t+3

-3t = -18

t= -18/-3

t = 6

Therefore, The digit on the tens place is 6  

and the digit on the units place is 3,

So, the number is 63.

I hope this might help you:)