Answer:

Let's make equation

60 is the main number

Difference means subtraction ,

60-3x = 15

-3x = 15-60

-3x = -45

x = -45/-3

x = 15

Answer:

15

Step-by-step explanation:

let the number = x

according to the question

60 - 3x = 15. ( P.K.P. )

60 - 15 = 3x

3x = 45

x = 45/3

x = 15