What’s the simplified form of 2x+3-x+5

What is the solution to the equation e3x=12? round your answer to the nearest hundredth

Sophia wrote an equation to represent the revenue of a movie theater for one day. she let x represent the number of child tickets sold and y represents the nunver of adult tickets sold. if a child ticket cost $4, an adult ticket cost $6, and the total revenue for the daybwas $420, which equation could sophia use to represent the number of chikd and adult tickets that were sold?

How can i differentiate this equation?