Question

3 numbers are in ratio 3:7:9 .if 5 is subtracted from the second the resulting number are in a p.find original number

Answer 1

let first number = 3x
second number =7x
third number = 9x

a/c to question,

3x , 7x -5, 9x are in AP

so, common difference of this is constant.

e.g 7x-5 -3x = 9x -7x +5

4x - 5 = 2x +5

2x = 10

x =5

hence ,
numbers are ..
15, 35, 45