4 + 5 = 9
7 + 9 = 16
5 × 7 = 35
8 + A = 13 → A = 13 - 8 → A = 5
4J = 16 → J = 16 / 4 → J = 4
7(2 + 4) → 7 × 6 → 42
5(6A + 6B) → 5 × 6(A + B) → 30A + 30B
7Y + 6Y = 52 → 13Y = 52 → Y = 52 / 13 → Y = 4
8C + 5C = 39 → 13C = 39 → C = 39 / 13 → C = 3
9M + 4M = 65 → 13M = 65 → M = 65 / 13 → M = 5