Answer: function notation
Step-by-step explanation:
let the number is 10x + 3.
then sum of its digits = x + 3.
from given condition, we have
x+3 = (1/7)* (10x + 3)
=> 7x + 21 = 10x + 3
=> 3x = 18
=> x = 6
therefore the number is 63.
Edit: Answer is 0. If you are still confused, let me know
0.54 is the answer!!!!!!!