Which pair is a solution of y=x-4?

Don't know how to find x given these segment lengths

Val and tony get paid per project. val is paid a project fee of $44 plus $12 per hour. tony is paid a project fee of $35 plus $15 per hour. write an expression to represent how much a company will pay to hire both to work the same number of hours on a project.

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