39:3+(91:3)=30:3+9:3

39 ∶ 3 = 13
91 ∶ 3 = 30,33
13 + 30,33 = 43,33
30 ∶ 3 = 10
9 ∶ 3 = 3
10 + 3 = 13

Ответ: 43,33 ≠ 13