Respuesta :

Answer:

x*3 +1 = 16

The unknown number is 5

Step-by-step explanation:

Let x be the unknown number

x*3 +1 = 16

Subtract 1 from each side

3x +1-1 = 16-1

3x = 15

Divide each side by 3

3x/3 = 15/3

x = 5

The unknown number is 5