The sum of the eleven numbers =5.5×11=60.5

Let the two numbers be a and b.

When adding the two numbers

(a+60.5+b)/13=7

a+b=91-60.5=30.5

Given a-b=10

By adding two equations

2a =40.5 , then a=20.25

by substituting in a-b=10

b=10.25

The two numbers are 20.25 &10.25