Question 7
A rectangular school playground has perimeter 32 m, and its length exceeds its width by 4 m. The main building runs along one long side. Trees are planted around the playground at 1 m intervals, with a tree at each of the two corners opposite the school. How many trees are planted?

Editorial clarification: No trees are planted on the building side, including its two endpoints.

Editorial clarification: No trees are planted on the building side, including its two endpoints.