One of these numbers is 15. Let the other number be x

2*(15-x)=15+x

30-2x=15+x

3x=15

therefore x=5

OR

2*(x-15)=x+15

2x-30=x+15

therefore x=45

So x can be 5 0r 45

• This reply was modified 3 months, 2 weeks ago by  Devikrishna.