Solution

159233

First name
Ata
School
Ashmole Academy
Age
11

If you substitute 'n' with something smaller than '7', 'n+10' is smaller.

If you substitute 'n' with '7', than both 'n+10' and '2n+3'is equal.

If you substitute 'n' with something bigger than '7', '2n+3' is bigger.