Question

15 less than 4 times a number is 9. find the number

Answer 1

according to the question
4x-15=9
4x=24
x=6

Answer 2

Hi there !!!

Lets assume the unknown no: to be  " x "

 4 times the no : is  4x

Its also given that 15 is subtracted from 4x

So ,
4 x - 15 = 9

 4 x = 9 + 15
 4 x = 24
 
 x = $\frac{24}{4}$
    = 6

The no: is 6