Question

A natural number when substracted from 28 it becomes equal to 160 times it's reciprocal.find the number​

Answer 1

let the natural no. b x

ATP,

=> 28- x = 160/x

=> 28x-x² = 160 => x²-28x+160 = 0

=> x²-20x - 8x +160 =0 => x(x-20) -8(x-20 ) = 0

=> (x-8) (x-20) = 0 => x = 8 ; x= 20

•°• natural no is 8 or 20