Respuesta :

Answer:

3x+12

Step-by-step explanation:

Expanding is basically the opposite of simplifying an equation, in order to expand you just multiply everything out

Here we have

[tex]3(x+4)[/tex]

which just means

[tex]3*(x+4)[/tex]

which is

[tex]3*x+3*4\\=3x+12[/tex]