Your mother has a new cell phone. It comes with 18 applications already installed. She uses only of those applications. She downloaded an additional 12 applications that she uses --- regularly. Write an equation to represent the total number of applications your mom uses. Explain your equation and your reasoning.

IT DOESNT TELL ME HOW MANY APPS SHE USES?!?! WHY?? LIKE I NEED THST INFO TO FINISH THE QUESTION...someone help ill give brainly