## 3. Benches

In the park, there is a group of students. If 7 students sit on each bench in the park, 8 students will be left without a seat. If the students were to sit 9 to a bench, four benches would remain empty. How many students are in the park?

Result: $\quad 162$
First solution. If we distribute 8 students who are left without seats to 2 per bench where 7 students are already sitting, we will have 4 benches with 9 students instead of 7.

Now, let's empty 4 benches with 7 students each. These 28 students can be distributed 2 per bench to 14 benches where 7 students are already sitting.

Thus, the total number of students in the park is 4$\cdot$9+14$\cdot$9=162.