AMO 2018 — Primary 5 (Grade 5) Question 8

Given □ + △ + ◇ = 30, △ + ◇ + ✶ = 22, ◇ + ✶ + □ = 26, and △ + ◇ + ✶ + □ = 37, find the value of ✶ + □ + △.