Question

if the sum of a number and its reciprocal is 58 upon
21 find the number

Answer 1

Solution :-
x/y + y/x = 58 / 21

Use this formula

x/y + y/x = (x² + y²)/xy = 58/21 

21 has only one way to combine as a product of 2 integers: 3*7 

Double-checking: 
x² + y² = 3² + 7² = 9 + 49 = 58 
xy = 2*7 = 21 

3/7 + 7/3 = 58/21

Ans :- The number is 3/7

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Answer 2

According to me 3/7 is the number.
hope it help you