Respuesta :

The correct answer is 15.
s512025750

Answer:

the aswer is 15

Step-by-step explanation:

The product of a number and 3 plus 1 is 19.  

1. the product of  a # and 3+1=19

      x+3+1=19

2. x is the variable

3. 3*5=15         15+3+1=19

4.x=15