2 x 7 = 14
x + y = 39 x - y = 11 _________ 2x = 50 x = 25 y = 14
No, they are not. You can add two composite numbers, 15 and 14 for example, and get a sum, 29, that is prime.
No.
It is the pair (5, 9).
8 and 6 have a difference of 2 and a sum of 14.
The two numbers are 21 and 7.
25 & 14
6 and 8
It is 14 and 6.
7 & 14
The numbers are 15 and 1
14 and 10
15 + 1 = 16 sum 15 - 1 = 14 difference
25 and 11
25 and 14.
14 and 25.