Question

A positive number when decresed by 4 is equal to 21 times the reciprocal of the number is

Answer 1

Answer:

7 or -3

Step-by-step explanation:

let the no. be 'x'

according to ques.

• x-4=21/x
• x^2-4x=21
• x^2-4x-21=0
• (x-7)(x+3)=0

hence , x=7 or -3