An experienced employee can enter tax data into a computer tree times as fast as a new employee. working together, it takes them 9hrs. how long would it take the experienced employee working alone?

12 hours

Step-by-step explanation:

Let x hours be the time needed for the experienced employee, then 3x hours is time needed for the new employee.

Then, the experienced employee completes of the whole work per hour and the new employee completes of the whole work per hour.

Altogether the can complete

of the whole work per hour and need

hours to finish the whole work.

Working together, it takes them 9 hours, then