According to BODMAS (Brackets, Orders, Division and Multiplication, Addition and Subtraction), We should start with multiplication.
Then, we should think about the numbers that will best advance us toward the predefined result. For instance, 3*5 equals 15, which is close to 16. If we apply it to the equation:
x + 15 = 16
x = 1
Therefore, a possible solution is (1, 3, 5).
Other possible solutions: (4, 2, 6), (8, 2, 4), (6, 2, 5).