Помогите решить задачу 6
3+9 = 7+5 = 12 9+4= 11+2 = 13 6+6 = 7+5 = 12 6+7 = 12+1 = 13 8+3 = 9+2 = 11 8+4 = 11+1 = 12 5+7 = 10+2 = 12 8+5 = 11+2 = 13