Respuesta :

robhu2015

Answer:

4x

Step-by-step explanation:

you have 3 of x and add another x to get 4 of x

carlos149

Answer:

4x

Step-by-step explanation:

everytime the variable is alone it stands for 1 so,

x is the same as 1x it's invisible 1 so no one puts it so,

3x + x is the same as 3x + 1x = 4x.

Ace- The Kid Laroi- Artist-Rapper, songwriter.