Respuesta :

Step-by-step explanation:

3x + 1

=3x + 1

this is because a variable X is attached to the 3 so it makes the 3x and the 1 unlike

therefore you can not add them.

Answer:

-1/3

Step-by-step explanation:

3x+1=

3x=-1

3x/3=-1/3

x=-1/3