HELP me please. Rate problem:
Working together, Alex and Millie can file all the papers in the file cabinets in 4 hours. It would have taken Alex 6 hours to do the job alone. What is the missing value in the table that represents the part of the papers that Alex would file if Alex and Millie worked together?

Question

anonymous · Answer

Here is the table.

radar · Answer

Since it is only Alex and Millie, find out how long it would take Millie alone to do the job.

anonymous · Answer

here are the answers that represents how much alex filed.
a:4r     b:4/6   c:6/4   d:6r

radar · Answer

Rather than use the equation:|dw:1415986623512:dw|