Hide lines marked with an x.

Hello, thank you so much for your help.
I think I have to see in Google how to use this autofilter.
No idea . I see for this option it is just possible to filter only columns. I need to hide the rows where the information is solved (that have an X in a cell for solved). And see the rows where I have to work to solve the problems (that have a X in the cell for not solved) How can I do this? ???
thank you again. From now on I will stop asking chickens when they cross the road for you. Have a great day.