A psychiatrist has 4 patients that need 25 sessions in total. One of the patients needs 6 sessions. Another patient needs 5 more than that. How many sessions would the remaining patients need?
The second patient needs 6+5 = <<6+5=11>>11 sessions.
The first two patients need 6+11=<<6+11=17>>17 sessions total.
25-17=<<25-17=8>>8 sessions.
#### 8