The sum is 15 and the diff is 11 plz help me

Question

This one is hard

Even though im good at math

these ones confuse meh

Answer 1

X+Y = 15

X-Y =  11

 

Adds them together: 2x = 26

                                 x = 13

                                 Then y = 2

 

 The numbers are 13 and 2